[SETUPLIB][USETUP] Slightly modify how and when the HW system partition is detected and used.

CORE-16274

SETUPLIB:
=========

- Find the system partition initially when we create the list of
  partitions.

- Split the old CheckActiveSystemPartition() helper in two helpers:
  FindSupportedSystemPartition() and SetActivePartition(). This allows
  simplifying slightly the former one, and allows the user, in an
  interactive situation, to decide whether the "supported system
  partition" found can actually be used or not.

- Remove the "OriginalSystemPartition" hack in the PARTLIST structure.
- Add a note regarding the SystemPartition member in PARTLIST.

USETUP:
=======

- Use the introduced helpers from above. If the "system" partition we
  are going to use, in case we install ReactOS on a fixed disk, is *NOT*
  the same as the original one (e.g. because it is detected to be not
  supported by ReactOS...), display an informative screen to the user
  and let him confirm whether or not he wants to change the partition.

If we install on a fixed disk, try to find a supported system partition
on the system. Otherwise if we install on a removable disk, use the
install partition as the system partition instead.

This allows providing a fix for CORE-16274.

base/setup/lib/utils/partlist.c

@@ -1883,10 +1883,147 @@ AddDiskToList(
     ScanForUnpartitionedDiskSpace(DiskEntry);
 }
 
+/*
+ * Retrieve the system disk, i.e. the fixed disk that is accessible by the
+ * firmware during boot time and where the system partition resides.
+ * If no system partition has been determined, we retrieve the first disk
+ * that verifies the mentioned criteria above.
+ */
+static
+PDISKENTRY
+GetSystemDisk(
+    IN PPARTLIST List)
+{
+    PLIST_ENTRY Entry;
+    PDISKENTRY DiskEntry;
+
+    /* Check for empty disk list */
+    if (IsListEmpty(&List->DiskListHead))
+        return NULL;
+
+    /*
+     * If we already have a system partition, the system disk
+     * is the one on which the system partition resides.
+     */
+    if (List->SystemPartition)
+        return List->SystemPartition->DiskEntry;
+
+    /* Loop over the disks and find the correct one */
+    for (Entry = List->DiskListHead.Flink;
+         Entry != &List->DiskListHead;
+         Entry = Entry->Flink)
+    {
+        DiskEntry = CONTAINING_RECORD(Entry, DISKENTRY, ListEntry);
+
+        /* The disk must be a fixed disk and be found by the firmware */
+        if (DiskEntry->MediaType == FixedMedia && DiskEntry->BiosFound)
+        {
+            break;
+        }
+    }
+    if (Entry == &List->DiskListHead)
+    {
+        /* We haven't encountered any suitable disk */
+        return NULL;
+    }
+
+    if (DiskEntry->DiskStyle == PARTITION_STYLE_GPT)
+    {
+        DPRINT1("System disk -- GPT-partitioned disk detected, not currently supported by SETUP!\n");
+    }
+
+    return DiskEntry;
+}
+
+/*
+ * Retrieve the actual "active" partition of the given disk.
+ * On MBR disks, partition with the Active/Boot flag set;
+ * on GPT disks, partition with the correct GUID.
+ */
+BOOLEAN
+IsPartitionActive(
+    IN PPARTENTRY PartEntry)
+{
+    // TODO: Support for GPT disks!
+
+    if (IsContainerPartition(PartEntry->PartitionType))
+        return FALSE;
+
+    /* Check if the partition is partitioned, used and active */
+    if (PartEntry->IsPartitioned &&
+        // !IsContainerPartition(PartEntry->PartitionType) &&
+        PartEntry->BootIndicator)
+    {
+        /* Yes it is */
+        ASSERT(PartEntry->PartitionType != PARTITION_ENTRY_UNUSED);
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+static
+PPARTENTRY
+GetActiveDiskPartition(
+    IN PDISKENTRY DiskEntry)
+{
+    PLIST_ENTRY ListEntry;
+    PPARTENTRY PartEntry;
+    PPARTENTRY ActivePartition = NULL;
+
+    /* Check for empty disk list */
+    // ASSERT(DiskEntry);
+    if (!DiskEntry)
+        return NULL;
+
+    /* Check for empty partition list */
+    if (IsListEmpty(&DiskEntry->PrimaryPartListHead))
+        return NULL;
+
+    if (DiskEntry->DiskStyle == PARTITION_STYLE_GPT)
+    {
+        DPRINT1("GPT-partitioned disk detected, not currently supported by SETUP!\n");
+        return NULL;
+    }
+
+    /* Scan all (primary) partitions to find the active disk partition */
+    for (ListEntry = DiskEntry->PrimaryPartListHead.Flink;
+         ListEntry != &DiskEntry->PrimaryPartListHead;
+         ListEntry = ListEntry->Flink)
+    {
+        /* Retrieve the partition */
+        PartEntry = CONTAINING_RECORD(ListEntry, PARTENTRY, ListEntry);
+        if (IsPartitionActive(PartEntry))
+        {
+            /* Yes, we've found it */
+            ASSERT(DiskEntry == PartEntry->DiskEntry);
+            ASSERT(PartEntry->IsPartitioned);
+
+            ActivePartition = PartEntry;
+
+            DPRINT1("Found active system partition %lu in disk %lu, drive letter %C\n",
+                    PartEntry->PartitionNumber, DiskEntry->DiskNumber,
+                    (PartEntry->DriveLetter == 0) ? L'-' : PartEntry->DriveLetter);
+            break;
+        }
+    }
+
+    /* Check if the disk is new and if so, use its first partition as the active system partition */
+    if (DiskEntry->NewDisk && ActivePartition != NULL)
+    {
+        // FIXME: What to do??
+        DPRINT1("NewDisk TRUE but already existing active partition?\n");
+    }
+
+    /* Return the active partition found (or none) */
+    return ActivePartition;
+}
+
 PPARTLIST
 CreatePartitionList(VOID)
 {
     PPARTLIST List;
+    PDISKENTRY SystemDisk;
     OBJECT_ATTRIBUTES ObjectAttributes;
     SYSTEM_DEVICE_INFORMATION Sdi;
     IO_STATUS_BLOCK Iosb;
@@ -1904,7 +2041,6 @@ CreatePartitionList(VOID)
         return NULL;
 
     List->SystemPartition = NULL;
-    List->OriginalSystemPartition = NULL;
 
     InitializeListHead(&List->DiskListHead);
     InitializeListHead(&List->BiosDiskListHead);
@@ -1957,6 +2093,13 @@ CreatePartitionList(VOID)
     UpdateHwDiskNumbers(List);
     AssignDriveLetters(List);
 
+    /*
+     * Retrieve the system partition: the active partition on the system
+     * disk (the one that will be booted by default by the hardware).
+     */
+    SystemDisk = GetSystemDisk(List);
+    List->SystemPartition = (SystemDisk ? GetActiveDiskPartition(SystemDisk) : NULL);
+
     return List;
 }
 
@@ -3093,14 +3236,10 @@ DeletePartition(
 
     ASSERT(PartEntry->PartitionType != PARTITION_ENTRY_UNUSED);
 
-    /* Clear the system partition pointers if it is being deleted */
+    /* Clear the system partition if it is being deleted */
     if (List->SystemPartition == PartEntry)
     {
         ASSERT(List->SystemPartition);
-        ASSERT(List->SystemPartition->DiskEntry->MediaType != RemovableMedia);
-
-        if (List->SystemPartition == List->OriginalSystemPartition)
-            List->OriginalSystemPartition = NULL;
         List->SystemPartition = NULL;
     }
 
@@ -3209,90 +3348,6 @@ DeletePartition(
     return TRUE;
 }
 
-/*
- * Retrieve the actual "active" partition of the given disk.
- * On MBR disks, partition with the Active/Boot flag set;
- * on GPT disks, partition with the correct GUID.
- */
-BOOLEAN
-IsPartitionActive(
-    IN PPARTENTRY PartEntry)
-{
-    // TODO: Support for GPT disks!
-
-    if (IsContainerPartition(PartEntry->PartitionType))
-        return FALSE;
-
-    /* Check if the partition is partitioned, used and active */
-    if (PartEntry->IsPartitioned &&
-        // !IsContainerPartition(PartEntry->PartitionType) &&
-        PartEntry->BootIndicator)
-    {
-        /* Yes it is */
-        ASSERT(PartEntry->PartitionType != PARTITION_ENTRY_UNUSED);
-        return TRUE;
-    }
-
-    return FALSE;
-}
-
-static
-PPARTENTRY
-GetActiveDiskPartition(
-    IN PDISKENTRY DiskEntry)
-{
-    PLIST_ENTRY ListEntry;
-    PPARTENTRY PartEntry;
-    PPARTENTRY ActivePartition = NULL;
-
-    /* Check for empty disk list */
-    // ASSERT(DiskEntry);
-    if (!DiskEntry)
-        return NULL;
-
-    /* Check for empty partition list */
-    if (IsListEmpty(&DiskEntry->PrimaryPartListHead))
-        return NULL;
-
-    if (DiskEntry->DiskStyle == PARTITION_STYLE_GPT)
-    {
-        DPRINT1("GPT-partitioned disk detected, not currently supported by SETUP!\n");
-        return NULL;
-    }
-
-    /* Scan all (primary) partitions to find the active disk partition */
-    for (ListEntry = DiskEntry->PrimaryPartListHead.Flink;
-         ListEntry != &DiskEntry->PrimaryPartListHead;
-         ListEntry = ListEntry->Flink)
-    {
-        /* Retrieve the partition */
-        PartEntry = CONTAINING_RECORD(ListEntry, PARTENTRY, ListEntry);
-        if (IsPartitionActive(PartEntry))
-        {
-            /* Yes, we've found it */
-            ASSERT(DiskEntry == PartEntry->DiskEntry);
-            ASSERT(PartEntry->IsPartitioned);
-
-            ActivePartition = PartEntry;
-
-            DPRINT1("Found active system partition %lu in disk %lu, drive letter %C\n",
-                    PartEntry->PartitionNumber, DiskEntry->DiskNumber,
-                    (PartEntry->DriveLetter == 0) ? L'-' : PartEntry->DriveLetter);
-            break;
-        }
-    }
-
-    /* Check if the disk is new and if so, use its first partition as the active system partition */
-    if (DiskEntry->NewDisk && ActivePartition != NULL)
-    {
-        // FIXME: What to do??
-        DPRINT1("NewDisk TRUE but already existing active partition?\n");
-    }
-
-    /* Return the active partition found (or none) */
-    return ActivePartition;
-}
-
 static
 BOOLEAN
 IsSupportedActivePartition(
@@ -3374,12 +3429,12 @@ IsSupportedActivePartition(
     return TRUE;
 }
 
-VOID
+PPARTENTRY
-CheckActiveSystemPartition(
+FindSupportedSystemPartition(
     IN PPARTLIST List,
     IN BOOLEAN ForceSelect,
-    IN PDISKENTRY AlternateDisk OPTIONAL,
+    IN PDISKENTRY AlternativeDisk OPTIONAL,
-    IN PPARTENTRY AlternatePart OPTIONAL)
+    IN PPARTENTRY AlternativePart OPTIONAL)
 {
     PLIST_ENTRY ListEntry;
     PDISKENTRY DiskEntry;
@@ -3391,75 +3446,63 @@ CheckActiveSystemPartition(
     if (IsListEmpty(&List->DiskListHead))
     {
         /* No system partition! */
-        List->SystemPartition = NULL;
+        ASSERT(List->SystemPartition == NULL);
-        List->OriginalSystemPartition = NULL;
         goto NoSystemPartition;
     }
 
-    if (List->SystemPartition != NULL)
+    /* Adjust the optional alternative disk if needed */
-    {
+    if (!AlternativeDisk && AlternativePart)
-        /* We already have an active system partition */
+        AlternativeDisk = AlternativePart->DiskEntry;
-        DPRINT1("Use the current system partition %lu in disk %lu, drive letter %C\n",
+
-                List->SystemPartition->PartitionNumber,
+    /* Ensure that the alternative partition is on the alternative disk */
-                List->SystemPartition->DiskEntry->DiskNumber,
+    if (AlternativePart)
-                (List->SystemPartition->DriveLetter == 0) ? L'-' : List->SystemPartition->DriveLetter);
+        ASSERT(AlternativeDisk && (AlternativePart->DiskEntry == AlternativeDisk));
-        return;
+
-    }
+    /* Ensure that the alternative disk is in the list */
+    if (AlternativeDisk)
+        ASSERT(AlternativeDisk->PartList == List);
 
     /* Start fresh */
-    List->SystemPartition = NULL;
+    CandidatePartition = NULL;
-    List->OriginalSystemPartition = NULL;
-
-    /* Adjust the optional alternate disk if needed */
-    if (!AlternateDisk && AlternatePart)
-        AlternateDisk = AlternatePart->DiskEntry;
-
-    /* Ensure that the alternate partition is on the alternate disk */
-    if (AlternatePart)
-        ASSERT(AlternateDisk && (AlternatePart->DiskEntry == AlternateDisk));
-
-    /* Ensure that the alternate disk is in the list */
-    if (AlternateDisk)
-        ASSERT(AlternateDisk->PartList == List);
 
 //
-// Pass == 1 : Check the first (system) disk.
+// Step 1 : Check the system disk.
 //
 
     /*
-     * First, check whether the first disk (the one that will be booted
+     * First, check whether the system disk, i.e. the one that will be booted
-     * by default by the hardware) contains an active partition. If so
+     * by default by the hardware, contains an active partition. If so this
-     * this should be our system partition.
+     * should be our system partition.
      */
-    DiskEntry = CONTAINING_RECORD(List->DiskListHead.Flink,
+    DiskEntry = GetSystemDisk(List);
-                                  DISKENTRY, ListEntry);
 
     if (DiskEntry->DiskStyle == PARTITION_STYLE_GPT)
     {
-        DPRINT1("First (system) disk -- GPT-partitioned disk detected, not currently supported by SETUP!\n");
+        DPRINT1("System disk -- GPT-partitioned disk detected, not currently supported by SETUP!\n");
-        goto UseAlternateDisk;
+        goto UseAlternativeDisk;
     }
 
-    ActivePartition = GetActiveDiskPartition(DiskEntry);
+    /* If we have a system partition (in the system disk), validate it */
-    if (ActivePartition)
+    ActivePartition = List->SystemPartition;
+    if (ActivePartition && IsSupportedActivePartition(ActivePartition))
     {
-        /* Save the actual system partition */
+        CandidatePartition = ActivePartition;
-        List->OriginalSystemPartition = ActivePartition;
 
-        /* If we get a candidate active partition in the first disk, validate it */
+        DPRINT1("Use the current system partition %lu in disk %lu, drive letter %C\n",
-        if (IsSupportedActivePartition(ActivePartition))
+                CandidatePartition->PartitionNumber,
-        {
+                CandidatePartition->DiskEntry->DiskNumber,
-            CandidatePartition = ActivePartition;
+                (CandidatePartition->DriveLetter == 0) ? L'-' : CandidatePartition->DriveLetter);
-            goto SystemPartitionFound;
+
-        }
+        /* Return the candidate system partition */
+        return CandidatePartition;
     }
 
-    /* If this first disk is not the optional alternate disk, perform the minimal checks */
+    /* If the system disk is not the optional alternative disk, perform the minimal checks */
-    if (DiskEntry != AlternateDisk)
+    if (DiskEntry != AlternativeDisk)
     {
         /*
          * No active partition has been recognized. Enumerate all the (primary)
-         * partitions in the first disk, excluding the possible current active
+         * partitions in the system disk, excluding the possible current active
          * partition, to find a new candidate.
          */
         for (ListEntry = DiskEntry->PrimaryPartListHead.Flink;
@@ -3470,7 +3513,7 @@ CheckActiveSystemPartition(
             PartEntry = CONTAINING_RECORD(ListEntry, PARTENTRY, ListEntry);
 
             /* Skip the current active partition */
-            if (/* ActivePartition != NULL && */ PartEntry == ActivePartition)
+            if (PartEntry == ActivePartition)
                 continue;
 
             /* Check if the partition is partitioned and used */
@@ -3479,11 +3522,11 @@ CheckActiveSystemPartition(
             {
                 ASSERT(PartEntry->PartitionType != PARTITION_ENTRY_UNUSED);
 
-                /* If we get a candidate active partition in the first disk, validate it */
+                /* If we get a candidate active partition in the disk, validate it */
                 if (IsSupportedActivePartition(PartEntry))
                 {
                     CandidatePartition = PartEntry;
-                    goto FindAndUseAlternativeSystemPartition;
+                    goto UseAlternativePartition;
                 }
             }
 
@@ -3495,7 +3538,7 @@ CheckActiveSystemPartition(
 
                 // TODO: Check for minimal size!!
                 CandidatePartition = PartEntry;
-                goto FindAndUseAlternativeSystemPartition;
+                goto UseAlternativePartition;
             }
 #endif
         }
@@ -3520,7 +3563,7 @@ CheckActiveSystemPartition(
                 PartEntry = CONTAINING_RECORD(ListEntry, PARTENTRY, ListEntry);
 
                 /* Skip the current active partition */
-                if (/* ActivePartition != NULL && */ PartEntry == ActivePartition)
+                if (PartEntry == ActivePartition)
                     continue;
 
                 /* Check for unpartitioned space */
@@ -3530,7 +3573,7 @@ CheckActiveSystemPartition(
 
                     // TODO: Check for minimal size!!
                     CandidatePartition = PartEntry;
-                    goto FindAndUseAlternativeSystemPartition;
+                    goto UseAlternativePartition;
                 }
             }
         }
@@ -3538,33 +3581,30 @@ CheckActiveSystemPartition(
 
 
 //
-// Pass == 2 : No active partition found: Check the alternate disk if specified.
+// Step 2 : No active partition found: Check the alternative disk if specified.
 //
 
-UseAlternateDisk:
+UseAlternativeDisk:
-    if (!AlternateDisk || (!ForceSelect && (DiskEntry != AlternateDisk)))
+    if (!AlternativeDisk || (!ForceSelect && (DiskEntry != AlternativeDisk)))
         goto NoSystemPartition;
 
-    if (AlternateDisk->DiskStyle == PARTITION_STYLE_GPT)
+    if (AlternativeDisk->DiskStyle == PARTITION_STYLE_GPT)
     {
-        DPRINT1("Alternate disk -- GPT-partitioned disk detected, not currently supported by SETUP!\n");
+        DPRINT1("Alternative disk -- GPT-partitioned disk detected, not currently supported by SETUP!\n");
         goto NoSystemPartition;
     }
 
-    if (DiskEntry != AlternateDisk)
+    if (DiskEntry != AlternativeDisk)
     {
-        /* Choose the alternate disk */
+        /* Choose the alternative disk */
-        DiskEntry = AlternateDisk;
+        DiskEntry = AlternativeDisk;
 
+        /* If we get a candidate active partition, validate it */
         ActivePartition = GetActiveDiskPartition(DiskEntry);
-        if (ActivePartition)
+        if (ActivePartition && IsSupportedActivePartition(ActivePartition))
         {
-            /* If we get a candidate active partition, validate it */
+            CandidatePartition = ActivePartition;
-            if (IsSupportedActivePartition(ActivePartition))
+            goto UseAlternativePartition;
-            {
-                CandidatePartition = ActivePartition;
-                goto FindAndUseAlternativeSystemPartition;
-            }
         }
     }
 
@@ -3575,7 +3615,7 @@ UseAlternateDisk:
  *** - If we want a really separate system partition from the partition where
  ***   we install, do something similar to what's done below in the code.
  *** - Otherwise if we allow for the system partition to be also the partition
- ***   where we install, just directly fall down to using AlternatePart.
+ ***   where we install, just directly fall down to using AlternativePart.
  ***/
 
     /* Retrieve the first partition of the disk */
@@ -3597,15 +3637,13 @@ UseAlternateDisk:
         {
             ASSERT(DiskEntry == CandidatePartition->DiskEntry);
 
-            List->SystemPartition = CandidatePartition;
-            List->OriginalSystemPartition = List->SystemPartition;
-
             DPRINT1("Use new first active system partition %lu in disk %lu, drive letter %C\n",
-                    List->SystemPartition->PartitionNumber,
+                    CandidatePartition->PartitionNumber,
-                    List->SystemPartition->DiskEntry->DiskNumber,
+                    CandidatePartition->DiskEntry->DiskNumber,
-                    (List->SystemPartition->DriveLetter == 0) ? L'-' : List->SystemPartition->DriveLetter);
+                    (CandidatePartition->DriveLetter == 0) ? L'-' : CandidatePartition->DriveLetter);
 
-            goto SetSystemPartition;
+            /* Return the candidate system partition */
+            return CandidatePartition;
         }
 
         // FIXME: What to do??
@@ -3638,81 +3676,116 @@ UseAlternateDisk:
          * so use the first one as the system partition.
          */
         ASSERT(DiskEntry == CandidatePartition->DiskEntry);
-        List->SystemPartition = CandidatePartition; // The first PartEntry
-        List->OriginalSystemPartition = List->SystemPartition;
 
         DPRINT1("Use first active system partition %lu in disk %lu, drive letter %C\n",
-                List->SystemPartition->PartitionNumber,
+                CandidatePartition->PartitionNumber,
-                List->SystemPartition->DiskEntry->DiskNumber,
+                CandidatePartition->DiskEntry->DiskNumber,
-                (List->SystemPartition->DriveLetter == 0) ? L'-' : List->SystemPartition->DriveLetter);
+                (CandidatePartition->DriveLetter == 0) ? L'-' : CandidatePartition->DriveLetter);
 
-        goto SetSystemPartition;
+        /* Return the candidate system partition */
+        return CandidatePartition;
     }
 
     /*
      * The disk is not new, we did not find any actual active partition,
-     * or the one we found was not supported, or any possible other canditate
+     * or the one we found was not supported, or any possible other candidate
-     * is not supported. We then use the alternate partition if specified.
+     * is not supported. We then use the alternative partition if specified.
      */
-    if (AlternatePart)
+    if (AlternativePart)
     {
-        DPRINT1("No system partition found, use the alternative partition!\n");
+        DPRINT1("No valid or supported system partition has been found, use the alternative partition!\n");
-        CandidatePartition = AlternatePart;
+        CandidatePartition = AlternativePart;
-        goto UseAlternativeSystemPartition;
+        goto UseAlternativePartition;
     }
     else
     {
 NoSystemPartition:
         DPRINT1("No valid or supported system partition has been found on this system!\n");
-        return;
+        return NULL;
     }
 
-
+UseAlternativePartition:
-SystemPartitionFound:
-    ASSERT(CandidatePartition);
-    List->SystemPartition = CandidatePartition;
-
-    DPRINT1("Use existing active system partition %lu in disk %lu, drive letter %C\n",
-            List->SystemPartition->PartitionNumber,
-            List->SystemPartition->DiskEntry->DiskNumber,
-            (List->SystemPartition->DriveLetter == 0) ? L'-' : List->SystemPartition->DriveLetter);
-
-    return;
-
-FindAndUseAlternativeSystemPartition:
     /*
-     * We are here because we have not found any (active) candidate
+     * We are here because we did not find any (active) candidate system
-     * system partition that we know how to support. What we are going
+     * partition that we know how to support. What we are going to do is
-     * to do is to change the existing system partition and use the
+     * to change the existing system partition and use the alternative partition
-     * partition on which we install ReactOS as the new system partition,
+     * (e.g. on which we install ReactOS) as the new system partition.
-     * and then we will need to add in FreeLdr's entry a boot entry to boot
+     * Then we will need to add in FreeLdr's boot menu an entry for booting
      * from the original system partition.
      */
-
-    /* Unset the old system partition */
-    if (List->OriginalSystemPartition)
-    {
-        List->OriginalSystemPartition->BootIndicator = FALSE;
-        List->OriginalSystemPartition->DiskEntry->LayoutBuffer->PartitionEntry[List->OriginalSystemPartition->PartitionIndex].BootIndicator = FALSE;
-        List->OriginalSystemPartition->DiskEntry->LayoutBuffer->PartitionEntry[List->OriginalSystemPartition->PartitionIndex].RewritePartition = TRUE;
-        List->OriginalSystemPartition->DiskEntry->Dirty = TRUE;
-    }
-
-UseAlternativeSystemPartition:
     ASSERT(CandidatePartition);
-    List->SystemPartition = CandidatePartition;
 
     DPRINT1("Use alternative active system partition %lu in disk %lu, drive letter %C\n",
-            List->SystemPartition->PartitionNumber,
+            CandidatePartition->PartitionNumber,
-            List->SystemPartition->DiskEntry->DiskNumber,
+            CandidatePartition->DiskEntry->DiskNumber,
-            (List->SystemPartition->DriveLetter == 0) ? L'-' : List->SystemPartition->DriveLetter);
+            (CandidatePartition->DriveLetter == 0) ? L'-' : CandidatePartition->DriveLetter);
 
-SetSystemPartition:
+    /* Return the candidate system partition */
-    /* Set the new active system partition */
+    return CandidatePartition;
-    List->SystemPartition->BootIndicator = TRUE;
+}
-    List->SystemPartition->DiskEntry->LayoutBuffer->PartitionEntry[List->SystemPartition->PartitionIndex].BootIndicator = TRUE;
+
-    List->SystemPartition->DiskEntry->LayoutBuffer->PartitionEntry[List->SystemPartition->PartitionIndex].RewritePartition = TRUE;
+BOOLEAN
-    List->SystemPartition->DiskEntry->Dirty = TRUE;
+SetActivePartition(
+    IN PPARTLIST List,
+    IN PPARTENTRY PartEntry,
+    IN PPARTENTRY OldActivePart OPTIONAL)
+{
+    /* Check for empty disk list */
+    if (IsListEmpty(&List->DiskListHead))
+        return FALSE;
+
+    /* Validate the partition entry */
+    if (!PartEntry)
+        return FALSE;
+
+    /*
+     * If the partition entry is already the system partition, or if it is
+     * the same as the old active partition hint the user provided (and if
+     * it is already active), just return success.
+     */
+    if ((PartEntry == List->SystemPartition) ||
+        ((PartEntry == OldActivePart) && IsPartitionActive(OldActivePart)))
+    {
+        return TRUE;
+    }
+
+    ASSERT(PartEntry->DiskEntry);
+
+    /* Ensure that the partition's disk is in the list */
+    ASSERT(PartEntry->DiskEntry->PartList == List);
+
+    /*
+     * If the user provided an old active partition hint, verify that it is
+     * indeeed active and belongs to the same disk where the new partition
+     * belongs. Otherwise determine the current active partition on the disk
+     * where the new partition belongs.
+     */
+    if (!(OldActivePart && IsPartitionActive(OldActivePart) && (OldActivePart->DiskEntry == PartEntry->DiskEntry)))
+    {
+        /* It's not, determine the current active partition for the disk */
+        OldActivePart = GetActiveDiskPartition(PartEntry->DiskEntry);
+    }
+
+    /* Unset the old active partition if it exists */
+    if (OldActivePart)
+    {
+        OldActivePart->BootIndicator = FALSE;
+        OldActivePart->DiskEntry->LayoutBuffer->PartitionEntry[OldActivePart->PartitionIndex].BootIndicator = FALSE;
+        OldActivePart->DiskEntry->LayoutBuffer->PartitionEntry[OldActivePart->PartitionIndex].RewritePartition = TRUE;
+        OldActivePart->DiskEntry->Dirty = TRUE;
+    }
+
+    /* Modify the system partition if the new partition is on the system disk */
+    if (PartEntry->DiskEntry == GetSystemDisk(List))
+        List->SystemPartition = PartEntry;
+
+    /* Set the new active partition */
+    PartEntry->BootIndicator = TRUE;
+    PartEntry->DiskEntry->LayoutBuffer->PartitionEntry[PartEntry->PartitionIndex].BootIndicator = TRUE;
+    PartEntry->DiskEntry->LayoutBuffer->PartitionEntry[PartEntry->PartitionIndex].RewritePartition = TRUE;
+    PartEntry->DiskEntry->Dirty = TRUE;
+
+    return TRUE;
 }
 
 NTSTATUS

base/setup/lib/utils/partlist.h

@@ -42,7 +42,7 @@ typedef struct _PARTENTRY
     ULARGE_INTEGER StartSector;
     ULARGE_INTEGER SectorCount;
 
-    BOOLEAN BootIndicator;
+    BOOLEAN BootIndicator;  // NOTE: See comment for the PARTLIST::SystemPartition member.
     UCHAR PartitionType;
     ULONG OnDiskPartitionNumber; /* Enumerated partition number (primary partitions first, excluding the extended partition container, then the logical partitions) */
     ULONG PartitionNumber;       /* Current partition number, only valid for the currently running NTOS instance */
@@ -149,17 +149,11 @@ typedef struct _PARTLIST
      * The corresponding system disk is obtained via:
      *    SystemPartition->DiskEntry.
      */
+    // NOTE: It seems to appear that the specifications of ARC and (u)EFI
+    // actually allow for multiple system partitions to exist on the system.
+    // If so we should instead rely on the BootIndicator bit of the PARTENTRY
+    // structure in order to find these.
     PPARTENTRY SystemPartition;
-    /*
-     * The original system partition in case we are redefining it because
-     * we do not have write support on it.
-     * Please note that this is partly a HACK and MUST NEVER happen on
-     * architectures where real system partitions are mandatory (because then
-     * they are formatted in FAT FS and we support write operation on them).
-     * The corresponding original system disk is obtained via:
-     *    OriginalSystemPartition->DiskEntry.
-     */
-    PPARTENTRY OriginalSystemPartition;
 
     LIST_ENTRY DiskListHead;
     LIST_ENTRY BiosDiskListHead;
@@ -323,12 +317,18 @@ DeletePartition(
     IN PPARTENTRY PartEntry,
     OUT PPARTENTRY* FreeRegion OPTIONAL);
 
-VOID
+PPARTENTRY
-CheckActiveSystemPartition(
+FindSupportedSystemPartition(
     IN PPARTLIST List,
     IN BOOLEAN ForceSelect,
-    IN PDISKENTRY AlternateDisk OPTIONAL,
+    IN PDISKENTRY AlternativeDisk OPTIONAL,
-    IN PPARTENTRY AlternatePart OPTIONAL);
+    IN PPARTENTRY AlternativePart OPTIONAL);
+
+BOOLEAN
+SetActivePartition(
+    IN PPARTLIST List,
+    IN PPARTENTRY PartEntry,
+    IN PPARTENTRY OldActivePart OPTIONAL);
 
 NTSTATUS
 WritePartitions(

base/setup/usetup/lang/bg-BG.h

@@ -127,7 +127,7 @@ static MUI_ENTRY bgBGWelcomePageEntries[] =
         "\x07  \215\240\342\250\341\255\245\342\245 L, \247\240 \244\240 \242\250\244\250\342\245 \340\240\247\340\245\350\250\342\245\253\255\250\342\245 (\253\250\346\245\255\247\255\250\342\245)",
         TEXT_STYLE_NORMAL
     },
-        {
+    {
         8,
         20,
         "   \250\247\250\341\252\242\240\255\250\357 \250 \343\341\253\256\242\250\357 \255\240 \220\245\240\252\342\216\221",
@@ -738,7 +738,8 @@ static MUI_ENTRY bgBGDisplayPageEntries[] =
         "\220\245\350\250\253\250 \341\342\245 \244\240 \341\254\245\255\250\342\245 \242\250\244\240 \255\240 \245\252\340\240\255\240.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  \210\247\241\245\340\245\342\245 \242\250\244\240 \255\240 \245\252\340\240\255\240 \341\352\341 \341\342\340\245\253\252\250\342\245 \255\240\243\256\340\245 \250 \255\240\244\256\253\343 \250 ",
          TEXT_STYLE_NORMAL
@@ -939,6 +940,112 @@ static MUI_ENTRY bgBGSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY bgBGChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY bgBGConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1384,7 +1491,6 @@ static MUI_ENTRY bgBGSelectFSEntries[] =
         "   ENTER = \217\340\256\244\352\253\246\240\242\240\255\245   ESC = \216\342\252\240\247   F3 = \210\247\345\256\244",
         TEXT_TYPE_STATUS
     },
-
     {
         0,
         0,
@@ -1705,14 +1811,14 @@ MUI_ERROR bgBGErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1779,6 +1885,10 @@ MUI_PAGE bgBGPages[] =
         SELECT_PARTITION_PAGE,
         bgBGSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        bgBGChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         bgBGConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/bn-BD.h

@@ -729,7 +729,8 @@ static MUI_ENTRY bnBDDisplayPageEntries[] =
         "You want to change the type of display to be installed.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Press the UP or DOWN key to select the desired display type.",
          TEXT_STYLE_NORMAL
@@ -929,6 +930,112 @@ static MUI_ENTRY bnBDSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY bnBDChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY bnBDConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1373,7 +1480,6 @@ static MUI_ENTRY bnBDSelectFSEntries[] =
         "ENTER = Continue   ESC = Cancel   F3 = Quit",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1546,7 +1652,7 @@ MUI_ERROR bnBDErrorEntries[] =
     {
         // ERROR_WARN_PARTITION,
           "Setup found that at least one harddisk contains an incompatible\n"
-          "partition table that can not be handled properly!\n"
+          "partition table that cannot be handled properly!\n"
           "\n"
           "Creating or deleting partitions can destroy the partition table.\n"
           "\n"
@@ -1556,15 +1662,15 @@ MUI_ERROR bnBDErrorEntries[] =
     },
     {
         // ERROR_NEW_PARTITION,
-        "You can not create a new Partition inside\n"
+        "You cannot create a new partition inside\n"
-        "of an already existing Partition!\n"
+        "of an already existing partition!\n"
         "\n"
         "  * Press any key to continue.",
         NULL
     },
     {
         // ERROR_DELETE_SPACE,
-        "You can not delete unpartitioned disk space!\n"
+        "You cannot delete unpartitioned disk space!\n"
         "\n"
         "  * Press any key to continue.",
         NULL
@@ -1692,14 +1798,14 @@ MUI_ERROR bnBDErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1766,6 +1872,10 @@ MUI_PAGE bnBDPages[] =
         SELECT_PARTITION_PAGE,
         bnBDSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        bnBDChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         bnBDConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/cs-CZ.h

@@ -738,7 +738,8 @@ static MUI_ENTRY csCZDisplayPageEntries[] =
         "Chcete zm\330nit typ obrazovky, kter\240 bude nainstalov\240na.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Po\247adovan\354 typ obrazovky zvolte pomoc\241 \347ipek nahoru a dol\205.",
          TEXT_STYLE_NORMAL
@@ -938,6 +939,112 @@ static MUI_ENTRY csCZSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY csCZChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY csCZConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1382,7 +1489,6 @@ static MUI_ENTRY csCZSelectFSEntries[] =
         "ENTER = Pokra\237ovat   ESC = Zru\347it   F3 = Ukon\237it",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1775,6 +1881,10 @@ MUI_PAGE csCZPages[] =
         SELECT_PARTITION_PAGE,
         csCZSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        csCZChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         csCZConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/da-DK.h

@@ -466,7 +466,7 @@ static MUI_ENTRY daDKRepairPageEntries[] =
         "underst\233tter den ikke alle funtionerne i et fult brugbart",
         TEXT_STYLE_NORMAL
     },
-	{
+    {
         6,
         10,
         "installationsprogram.",
@@ -945,6 +945,112 @@ static MUI_ENTRY daDKSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY daDKChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY daDKConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1389,7 +1495,6 @@ static MUI_ENTRY daDKSelectFSEntries[] =
         "ENTER = Forts\221t   ESC = Annuller   F3 = Afslut",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1783,6 +1888,10 @@ MUI_PAGE daDKPages[] =
         SELECT_PARTITION_PAGE,
         daDKSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        daDKChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         daDKConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/de-DE.h

@@ -732,7 +732,8 @@ static MUI_ENTRY deDEDisplayPageEntries[] =
         "Sie wollen den zu installierenden Bildschirmtyp \204ndern.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
         "\x07  Benutzen Sie die PFEILTASTEN, um den gew\201nschten",
          TEXT_STYLE_NORMAL
@@ -926,6 +927,112 @@ static MUI_ENTRY deDESelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY deDEChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY deDEConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1376,7 +1483,6 @@ static MUI_ENTRY deDESelectFSEntries[] =
         "EINGABETASTE = Fortfahren   ESC = Zur\201ck   F3 = Installation abbrechen",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1772,6 +1878,10 @@ MUI_PAGE deDEPages[] =
         SELECT_PARTITION_PAGE,
         deDESelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        deDEChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         deDEConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/el-GR.h

@@ -738,12 +738,14 @@ static MUI_ENTRY elGRDisplayPageEntries[] =
         "\207\342\242\234\253\234 \244\230 \230\242\242\341\245\234\253\234 \253\246\244 \253\347\247\246 \253\236\252 \234\243\255\341\244\240\251\236\252 \247\246\254 \237\230 \234\232\241\230\253\230\251\253\230\237\234\345.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  \217\230\253\343\251\253\234 \253\246 \247\242\343\241\253\250\246 \217\200\214\227 \343 \211\200\222\227 \232\240\230 \244\230 \234\247\240\242\342\245\234\253\234 \253\246\244 \234\247\240\237\254\243\236\253\346.",
          TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         11,
          "  \253\347\247\246 \234\243\255\341\244\240\251\236\252.",
          TEXT_STYLE_NORMAL
@@ -944,6 +946,112 @@ static MUI_ENTRY elGRSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY elGRChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY elGRConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1400,7 +1508,6 @@ static MUI_ENTRY elGRSelectFSEntries[] =
         "   ENTER = \221\254\244\342\256\234\240\230   ESC = \200\241\347\250\340\251\236   F3 = \200\247\246\256\351\250\236\251\236",
         TEXT_TYPE_STATUS
     },
-
     {
         0,
         0,
@@ -1711,14 +1818,14 @@ MUI_ERROR elGRErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1785,6 +1892,10 @@ MUI_PAGE elGRPages[] =
         SELECT_PARTITION_PAGE,
         elGRSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        elGRChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         elGRConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/en-US.h

@@ -730,7 +730,8 @@ static MUI_ENTRY enUSDisplayPageEntries[] =
         "You want to change the type of display to be installed.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Press the UP or DOWN key to select the desired display type.",
          TEXT_STYLE_NORMAL
@@ -930,6 +931,112 @@ static MUI_ENTRY enUSSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY enUSChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY enUSConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1374,7 +1481,6 @@ static MUI_ENTRY enUSSelectFSEntries[] =
         "ENTER = Continue   ESC = Cancel   F3 = Quit",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1547,7 +1653,7 @@ MUI_ERROR enUSErrorEntries[] =
     {
         // ERROR_WARN_PARTITION,
         "Setup found that at least one harddisk contains an incompatible\n"
-        "partition table that can not be handled properly!\n"
+        "partition table that cannot be handled properly!\n"
         "\n"
         "Creating or deleting partitions can destroy the partition table.\n"
         "\n"
@@ -1557,15 +1663,15 @@ MUI_ERROR enUSErrorEntries[] =
     },
     {
         // ERROR_NEW_PARTITION,
-        "You can not create a new Partition inside\n"
+        "You cannot create a new partition inside\n"
-        "of an already existing Partition!\n"
+        "of an already existing partition!\n"
         "\n"
         "  * Press any key to continue.",
         NULL
     },
     {
         // ERROR_DELETE_SPACE,
-        "You can not delete unpartitioned disk space!\n"
+        "You cannot delete unpartitioned disk space!\n"
         "\n"
         "  * Press any key to continue.",
         NULL
@@ -1693,14 +1799,14 @@ MUI_ERROR enUSErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1767,6 +1873,10 @@ MUI_PAGE enUSPages[] =
         SELECT_PARTITION_PAGE,
         enUSSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        enUSChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         enUSConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/es-ES.h

@@ -734,7 +734,8 @@ static MUI_ENTRY esESDisplayPageEntries[] =
         "Desea modificar el tipo de pantalla a instalar.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Presione ARRIBA y ABAJO para modificar el tipo.",
          TEXT_STYLE_NORMAL
@@ -935,6 +936,112 @@ static MUI_ENTRY esESSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY esESChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY esESConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1379,7 +1486,6 @@ static MUI_ENTRY esESSelectFSEntries[] =
         "   INTRO = Continuar   ESC = Cancelar   F3 = Salir",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1772,6 +1878,10 @@ MUI_PAGE esESPages[] =
         SELECT_PARTITION_PAGE,
         esESSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        esESChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         esESConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/et-EE.h

@@ -732,7 +732,8 @@ static MUI_ENTRY etEEDisplayPageEntries[] =
         "Ekraani t\201\201bi muutmine.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Liigu \201les-alla, et ekraani t\201\201pi muuta.",
          TEXT_STYLE_NORMAL
@@ -933,6 +934,112 @@ static MUI_ENTRY etEESelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY etEEChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY etEEConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1377,7 +1484,6 @@ static MUI_ENTRY etEESelectFSEntries[] =
         "ENTER = J\204tka   ESC = Katkesta   F3 = V\204lju",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1694,7 +1800,7 @@ MUI_ERROR etEEErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Vajuta mis tahes klahvi, et j\204tkata."
@@ -1768,6 +1874,10 @@ MUI_PAGE etEEPages[] =
         SELECT_PARTITION_PAGE,
         etEESelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        etEEChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         etEEConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/fr-FR.h

@@ -738,7 +738,8 @@ static MUI_ENTRY frFRDisplayPageEntries[] =
         "Vous voulez changer le type d'\202cran \205 installer.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Appuyer sur HAUT ou BAS pour s\202lectionner le type d'\202cran.",
          TEXT_STYLE_NORMAL
@@ -938,6 +939,112 @@ static MUI_ENTRY frFRSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY frFRChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " Installation de ReactOS " KERNEL_VERSION_STR " ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "La partition syst\212me actuelle de votre ordinateur",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "sur le disque syst\212me",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "emploie un format qui n'est pas support\202 par ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "Afin de pouvoir installer ReactOS avec succ\212s, ReactOS Setup doit changer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "la partition syst\212me actuelle par une nouvelle.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "La nouvelle partition syst\212me candidate est :",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  Pour accepter ce choix, appuyez sur ENTR\220E.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  Pour changer manuellement la partition syst\212me, appuyez sur \220CHAP",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   afin de revenir dans la liste des partitions, puis s\202lectionnez ou",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   cr\202ez une nouvelle partition syst\212me sur le disque syst\212me.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "S'il existe d'autres syst\212mes d'exploitation qui d\202pendent de la partition",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "syst\212me d'origine, vous devrez peut-\210tre les reconfigurer pour la nouvelle",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "partition syst\212me, ou bien changer la partition syst\212me vers celle",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "d'origine apr\212s la fin de l'installation de ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTR\220E = Continuer  \220CHAP = Annuler",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY frFRConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1394,7 +1501,6 @@ static MUI_ENTRY frFRSelectFSEntries[] =
         "ENTR\220E = Continuer   \220CHAP = Annuler   F3 = Quitter",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1438,7 +1544,7 @@ static MUI_ENTRY frFRDeletePartitionEntries[] =
     {
         0,
         0,
-        "L = Supprimer la Partition   \220CHAP = Annuler   F3 = Quitter",
+        "L = Supprimer la partition   \220CHAP = Annuler   F3 = Quitter",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
     {
@@ -1577,8 +1683,8 @@ MUI_ERROR frFRErrorEntries[] =
     },
     {
         // ERROR_NEW_PARTITION,
-        "Vous ne pouvez cr\202er une nouvelle Partition \205 l'int\202rieur\n"
+        "Vous ne pouvez cr\202er une nouvelle partition \205 l'int\202rieur\n"
-        "d'une Partition d\202j\205 existante!\n"
+        "d'une partition d\202j\205 existante!\n"
         "\n"
         "  * Appuyer sur une touche pour continuer.",
         NULL
@@ -1787,6 +1893,10 @@ MUI_PAGE frFRPages[] =
         SELECT_PARTITION_PAGE,
         frFRSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        frFRChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         frFRConfirmDeleteSystemPartitionEntries
@@ -1854,13 +1964,13 @@ MUI_STRING frFRStrings[] =
     {STRING_PLEASEWAIT,
      "   Veuillez patienter..."},
     {STRING_INSTALLCREATEPARTITION,
-     "   ENTR\220E = Installer   P/E = Cr\202er Partition Primaire/\220tendue   F3 = Quitter"},
+     "   ENTR\220E = Installer   P/E = Cr\202er partition Primaire/\220tendue   F3 = Quitter"},
     {STRING_INSTALLCREATELOGICAL,
-     "   ENTR\220E = Installer   L = Cr\202er Partition Logique   F3 = Quitter"},
+     "   ENTR\220E = Installer   L = Cr\202er partition Logique   F3 = Quitter"},
     {STRING_INSTALLDELETEPARTITION,
-     "   ENTR\220E = Installer   D = Supprimer Partition   F3 = Quitter"},
+     "   ENTR\220E = Installer   D = Supprimer partition   F3 = Quitter"},
     {STRING_DELETEPARTITION,
-     "   D = Supprimer Partition   F3 = Quitter"},
+     "   D = Supprimer partition   F3 = Quitter"},
     {STRING_PARTITIONSIZE,
      "Taille de la nouvelle partition :"},
     {STRING_CHOOSENEWPARTITION,
@@ -1872,15 +1982,15 @@ MUI_STRING frFRStrings[] =
     {STRING_HDDSIZE,
     "Veuillez entrer la taille de la nouvelle partition en m\202gaoctets."},
     {STRING_CREATEPARTITION,
-     "   ENTR\220E = Cr\202er Partition   \220CHAP = Annuler   F3 = Quitter"},
+     "   ENTR\220E = Cr\202er partition   \220CHAP = Annuler   F3 = Quitter"},
     {STRING_PARTFORMAT,
-    "Cette Partition sera ensuite format\202e."},
+    "Cette partition sera ensuite format\202e."},
     {STRING_NONFORMATTEDPART,
     "Vous avez choisi d'installer ReactOS sur une nouvelle partition."},
     {STRING_NONFORMATTEDSYSTEMPART,
-    "The system partition is not formatted yet."},
+    "La partition syst\212me n'est pas encore format\202e."},
     {STRING_NONFORMATTEDOTHERPART,
-    "The new partition is not formatted yet."},
+    "La nouvelle partition n'est pas encore format\202e."},
     {STRING_INSTALLONPART,
     "Setup installe ReactOS sur la partition"},
     {STRING_CHECKINGPART,

base/setup/usetup/lang/he-IL.h

@@ -734,7 +734,8 @@ static MUI_ENTRY heILDisplayPageEntries[] =
         ".\217\227\232\205\216\204 \204\202\205\226\232\204 \202\205\221 \232\200 \232\205\220\231\214 \212\220\205\226\230\201",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  .\211\205\226\230\204 \204\202\205\226\232\204 \202\205\221 \232\200 \230\205\207\201\214 \211\203\213 \204\210\216\214 \205\200 \204\214\222\216\214 \214\222 \225\207\214",
          TEXT_STYLE_NORMAL
@@ -934,6 +935,112 @@ static MUI_ENTRY heILSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY heILChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY heILConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1378,7 +1485,6 @@ static MUI_ENTRY heILSelectFSEntries[] =
         "\204\220\227\232\204 \214\205\210\211\201 = F3  \214\205\210\211\201 = ESC  \212\231\216\204 = ENTER",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1769,6 +1875,10 @@ MUI_PAGE heILPages[] =
         SELECT_PARTITION_PAGE,
         heILSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        heILChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         heILConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/it-IT.h

@@ -729,7 +729,8 @@ static MUI_ENTRY itITDisplayPageEntries[] =
         "Desidera modificare il tipo di schermo.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Premere i tasti SU e GI\xEB per modificare il tipo.",
          TEXT_STYLE_NORMAL
@@ -929,6 +930,112 @@ static MUI_ENTRY itITSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY itITChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY itITConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1379,7 +1486,6 @@ static MUI_ENTRY itITSelectFSEntries[] =
         "   INVIO = Continua   ESC = Annulla   F3 = Termina",
         TEXT_TYPE_STATUS
     },
-
     {
         0,
         0,
@@ -1772,6 +1878,10 @@ MUI_PAGE itITPages[] =
         SELECT_PARTITION_PAGE,
         itITSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        itITChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         itITConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/ja-JP.h

@@ -732,7 +732,8 @@ static MUI_ENTRY jaJPDisplayPageEntries[] =
         "\262\335\275\304\260\331 \273\332\331 \303\336\250\275\314\337\332\262\311 \274\255\331\262\246 \315\335\272\263 \275\331 \272\304\266\336 \276\335\300\270 \273\332\317\274\300\241",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  UP \323\274\270\312 DOWN \267\260\246 \265\274\303 \303\267\275\331 \303\336\250\275\314\337\332\262\311 \274\255\331\262\246 \276\335\300\270 \274\303 \270\300\336\273\262\241",
          TEXT_STYLE_NORMAL
@@ -933,6 +934,112 @@ static MUI_ENTRY jaJPSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY jaJPChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY jaJPConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1377,7 +1484,6 @@ static MUI_ENTRY jaJPSelectFSEntries[] =
         "ENTER = \277\336\257\272\263   ESC = \267\254\335\276\331   F3 = \301\255\263\274",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1696,14 +1802,14 @@ MUI_ERROR jaJPErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1770,6 +1876,10 @@ MUI_PAGE jaJPPages[] =
         SELECT_PARTITION_PAGE,
         jaJPSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        jaJPChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         jaJPConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/lt-LT.h

@@ -741,7 +741,8 @@ static MUI_ENTRY ltLTDisplayPageEntries[] =
         "You want to change the type of display to be installed.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Press the UP or DOWN key to select the desired display type.",
          TEXT_STYLE_NORMAL
@@ -941,6 +942,112 @@ static MUI_ENTRY ltLTSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY ltLTChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY ltLTConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1385,7 +1492,6 @@ static MUI_ENTRY ltLTSelectFSEntries[] =
         "ENTER = T\322sti   ESC = At\325aukti   F3 = Baigti",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1558,7 +1664,7 @@ MUI_ERROR ltLTErrorEntries[] =
     {
         // ERROR_WARN_PARTITION,
           "Setup found that at least one harddisk contains an incompatible\n"
-          "partition table that can not be handled properly!\n"
+          "partition table that cannot be handled properly!\n"
           "\n"
           "Creating or deleting partitions can destroy the partition table.\n"
           "\n"
@@ -1568,15 +1674,15 @@ MUI_ERROR ltLTErrorEntries[] =
     },
     {
         // ERROR_NEW_PARTITION,
-        "You can not create a new Partition inside\n"
+        "You cannot create a new partition inside\n"
-        "of an already existing Partition!\n"
+        "of an already existing partition!\n"
         "\n"
         "  * Press any key to continue.",
         NULL
     },
     {
         // ERROR_DELETE_SPACE,
-        "You can not delete unpartitioned disk space!\n"
+        "You cannot delete unpartitioned disk space!\n"
         "\n"
         "  * Press any key to continue.",
         NULL
@@ -1704,14 +1810,14 @@ MUI_ERROR ltLTErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1778,6 +1884,10 @@ MUI_PAGE ltLTPages[] =
         SELECT_PARTITION_PAGE,
         ltLTSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        ltLTChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         ltLTConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/ms-MY.h

@@ -729,7 +729,8 @@ static MUI_ENTRY msMYDisplayPageEntries[] =
         "Anda ingin tukar jenis paparan untuk dipasang.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Tekan kekunci UP atau DOWN untuk memilih",
          TEXT_STYLE_NORMAL
@@ -923,6 +924,206 @@ static MUI_ENTRY msMYSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY msMYChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
+static MUI_ENTRY msMYConfirmDeleteSystemPartitionEntries[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "You have chosen to delete the system partition.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        10,
+        "System partitions can contain diagnostic programs, hardware configuration",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        11,
+        "programs, programs to start an operating system (like ReactOS) or other",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "programs provided by the hardware manufacturer.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        14,
+        "Delete a system partition only when you are sure that there are no such",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        15,
+        "programs on the partition, or when you are sure you want to delete them.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "When you delete the partition, you might not be able to boot the",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        17,
+        "computer from the harddisk until you finished the ReactOS Setup.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        20,
+        "\x07  Press ENTER to delete the system partition. You will be asked",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        21,
+        "   to confirm the deletion of the partition again later.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        24,
+        "\x07  Press ESC to return to the previous page. The partition will",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "   not be deleted.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER=Continue  ESC=Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY msMYFormatPartitionEntries[] =
 {
     {
@@ -1273,7 +1474,6 @@ static MUI_ENTRY msMYSelectFSEntries[] =
         "ENTER = Teruskan   ESC = Batal   F3 = Keluar",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1659,6 +1859,14 @@ MUI_PAGE msMYPages[] =
         SELECT_PARTITION_PAGE,
         msMYSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        msMYChangeSystemPartition
+    },
+    {
+        CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
+        msMYConfirmDeleteSystemPartitionEntries
+    },
     {
         SELECT_FILE_SYSTEM_PAGE,
         msMYSelectFSEntries

base/setup/usetup/lang/nl-NL.h

@@ -945,6 +945,112 @@ static MUI_ENTRY nlNLSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY nlNLChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY nlNLConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1389,7 +1495,6 @@ static MUI_ENTRY nlNLSelectFSEntries[] =
         "ENTER = Doorgaan   ESC = Annuleren   F3 = Afsluiten",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1718,14 +1823,14 @@ MUI_ERROR nlNLErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1792,6 +1897,10 @@ MUI_PAGE nlNLPages[] =
         SELECT_PARTITION_PAGE,
         nlNLSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        nlNLChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         nlNLConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/pl-PL.h

@@ -741,7 +741,8 @@ static MUI_ENTRY plPLDisplayPageEntries[] =
         "Chcesz zmieni\206 rozdzielczo\230\206 monitora.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  U\276ywaj\245c klawiszy G\340RA lub D\340\235, wybierz rozdzielczo\230\206 i llo\230\206",
          TEXT_STYLE_NORMAL
@@ -941,6 +942,112 @@ static MUI_ENTRY plPLSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY plPLChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY plPLConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1385,7 +1492,6 @@ static MUI_ENTRY plPLSelectFSEntries[] =
         "ENTER = Kontynuacja   ESC = Anulowanie   F3 = Wyj\230cie",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1778,6 +1884,10 @@ MUI_PAGE plPLPages[] =
         SELECT_PARTITION_PAGE,
         plPLSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        plPLChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         plPLConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/pt-BR.h

@@ -738,7 +738,8 @@ static MUI_ENTRY ptBRDisplayPageEntries[] =
         "A lista a seguir mostra os tipos de v\241deo dispon\241veis para instala\207\306o.",
         TEXT_STYLE_NORMAL
     },
-    {   6,
+    {
+        6,
         10,
          "Use as teclas SETA PARA CIMA e SETA PARA BAIXO para selecionar",
          TEXT_STYLE_NORMAL
@@ -945,6 +946,112 @@ static MUI_ENTRY ptBRSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY ptBRChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY ptBRConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1401,7 +1508,6 @@ static MUI_ENTRY ptBRSelectFSEntries[] =
         "ENTER=Continuar  ESC=Cancelar  F3=Sair",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1726,14 +1832,14 @@ MUI_ERROR ptBRErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1800,6 +1906,10 @@ MUI_PAGE ptBRPages[] =
         SELECT_PARTITION_PAGE,
         ptBRSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        ptBRChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         ptBRConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/pt-PT.h

@@ -57,7 +57,7 @@ static MUI_ENTRY ptPTLanguagePageEntries[] =
         "\x07  Por favor, seleccione o idioma a ser utilizado durante a instala\207\306o.",
         TEXT_STYLE_NORMAL
     },
-     {
+    {
         8,
         11,
         "\x07  O idioma seleccionado ser\240 o idioma padr\306o do sistema.",
@@ -738,7 +738,8 @@ static MUI_ENTRY ptPTDisplayPageEntries[] =
         "A lista a seguir mostra os tipos de v\241deo dispon\241veis para instala\207\306o.",
         TEXT_STYLE_NORMAL
     },
-    {   6,
+    {
+        6,
         10,
          "Use as teclas SETA PARA CIMA e SETA PARA BAIXO para seleccionar",
          TEXT_STYLE_NORMAL
@@ -945,6 +946,112 @@ static MUI_ENTRY ptPTSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY ptPTChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY ptPTConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1401,7 +1508,6 @@ static MUI_ENTRY ptPTSelectFSEntries[] =
         "ENTER=Continuar  ESC=Cancelar  F3=Sair",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1711,14 +1817,14 @@ MUI_ERROR ptPTErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1785,6 +1891,10 @@ MUI_PAGE ptPTPages[] =
         SELECT_PARTITION_PAGE,
         ptPTSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        ptPTChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         ptPTConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/ro-RO.h

@@ -764,7 +764,8 @@ static MUI_ENTRY roRODisplayPageEntries[] =
         "Dori\376i modificarea parametrilor grafici de afi\272are?",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
         "\x07  Utiliza\376i tastele SUS/JOS pentru a selecta",
          TEXT_STYLE_NORMAL
@@ -964,6 +965,112 @@ static MUI_ENTRY roROSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY roROChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY roROConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1408,7 +1515,6 @@ static MUI_ENTRY roROSelectFSEntries[] =
         "ENTER = Continuare   ESC = Anulare   F3 = Ie\272ire",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1816,6 +1922,10 @@ MUI_PAGE roROPages[] =
         SELECT_PARTITION_PAGE,
         roROSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        roROChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         roROConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/ru-RU.h

@@ -750,7 +750,8 @@ static MUI_ENTRY ruRUDisplayPageEntries[] =
         "\202\353 \345\256\342\250\342\245 \250\247\254\245\255\250\342\354 \343\341\342\240\255\240\242\253\250\242\240\245\254\353\251 \342\250\257 \355\252\340\240\255\240.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  \215\240\246\254\250\342\245 \252\253\240\242\250\350\250 \202\202\205\220\225 \250\253\250 \202\215\210\207 \244\253\357 \242\353\241\256\340\240 \342\250\257\240 \355\252\340\240\255\240.",
          TEXT_STYLE_NORMAL
@@ -950,6 +951,112 @@ static MUI_ENTRY ruRUSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY ruRUChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY ruRUConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1394,7 +1501,6 @@ static MUI_ENTRY ruRUSelectFSEntries[] =
         "ENTER = \217\340\256\244\256\253\246\250\342\354   ESC = \216\342\254\245\255\240   F3 = \202\353\345\256\244",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1787,6 +1893,10 @@ MUI_PAGE ruRUPages[] =
         SELECT_PARTITION_PAGE,
         ruRUSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        ruRUChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         ruRUConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/sk-SK.h

@@ -738,7 +738,8 @@ static MUI_ENTRY skSKDisplayPageEntries[] =
         "Chcete zmeni\234 typ monitora, ktor\354 m\240 by\234 nain\347talovan\354.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Stla\237te kl\240ves HORE alebo DOLE pre v\354ber po\247adovan\202ho typu monitora.",
          TEXT_STYLE_NORMAL
@@ -939,6 +940,112 @@ static MUI_ENTRY skSKSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY skSKChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY skSKConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1383,7 +1490,6 @@ static MUI_ENTRY skSKSelectFSEntries[] =
         "ENTER = Pokra\237ova\234   ESC = Zru\347i\234   F3 = Skon\237i\234",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1705,14 +1811,14 @@ MUI_ERROR skSKErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1779,6 +1885,10 @@ MUI_PAGE skSKPages[] =
         SELECT_PARTITION_PAGE,
         skSKSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        skSKChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         skSKConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/sq-AL.h

@@ -736,7 +736,8 @@ static MUI_ENTRY sqALDisplayPageEntries[] =
         "Ju deshironi t\211 ndryshoje llojin e ekranit p\211r t\211 instaluar.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Klikoni butonat UP aso DOWN p\211r t\211 p\211rzgjedhur tipin e ekranin t\211 d\211shiruar.",
          TEXT_STYLE_NORMAL
@@ -937,6 +938,112 @@ static MUI_ENTRY sqALSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY sqALChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY sqALConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1381,7 +1488,6 @@ static MUI_ENTRY sqALSelectFSEntries[] =
         "ENTER = Vazhdo   ESC = Anulo   F3 = Dil",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1706,14 +1812,14 @@ MUI_ERROR sqALErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1780,6 +1886,10 @@ MUI_PAGE sqALPages[] =
         SELECT_PARTITION_PAGE,
         sqALSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        sqALChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         sqALConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/sv-SE.h

@@ -738,7 +738,8 @@ static MUI_ENTRY svSEDisplayPageEntries[] =
         "\216ndra vilken typ av bildsk\204rmsinst\204llning som ska installeras.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  Anv\204nd UPP- och NED-piltangenterna f\224r att v\204lja \224nskad inst\204llning.",
          TEXT_STYLE_NORMAL
@@ -939,6 +940,112 @@ static MUI_ENTRY svSESelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY svSEChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY svSEConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1383,7 +1490,6 @@ static MUI_ENTRY svSESelectFSEntries[] =
         "   ENTER = Forts\204tt   ESC = Avbryt   F3 = Avsluta",
         TEXT_TYPE_STATUS
     },
-
     {
         0,
         0,
@@ -1702,14 +1808,14 @@ MUI_ERROR svSEErrorEntries[] =
     },
     {
         // ERROR_PARTITION_TABLE_FULL,
-        "You can not create a new primary or extended partition in the\n"
+        "You cannot create a new primary or extended partition in the\n"
         "partition table of this disk because the partition table is full.\n"
         "\n"
         "  * Press any key to continue."
     },
     {
         // ERROR_ONLY_ONE_EXTENDED,
-        "You can not create more than one extended partition per disk.\n"
+        "You cannot create more than one extended partition per disk.\n"
         "\n"
         "  * Press any key to continue."
     },
@@ -1776,6 +1882,10 @@ MUI_PAGE svSEPages[] =
         SELECT_PARTITION_PAGE,
         svSESelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        svSEChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         svSEConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/tr-TR.h

@@ -729,7 +729,8 @@ static MUI_ENTRY trTRDisplayPageEntries[] =
         "Kurulum yap\215lacak g\224r\201nt\201n\201n t\201r\201n\201 se\207mek isteyebilirsiniz.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
         "\x07  \230stenen g\224r\201nt\201 t\201r\201n\201 se\207mek i\207in YUKARI'ya veya A\236A\246I'ya bas\215n\215z.",
         TEXT_STYLE_NORMAL
@@ -923,6 +924,112 @@ static MUI_ENTRY trTRSelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY trTRChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY trTRConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1355,7 +1462,6 @@ static MUI_ENTRY trTRSelectFSEntries[] =
         "ENTER = S\201rd\201r   ESC = \230ptal   F3 = \200\215k",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1748,6 +1854,10 @@ MUI_PAGE trTRPages[] =
         SELECT_PARTITION_PAGE,
         trTRSelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        trTRChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         trTRConfirmDeleteSystemPartitionEntries

base/setup/usetup/lang/uk-UA.h

@@ -737,7 +737,8 @@ static MUI_ENTRY ukUADisplayPageEntries[] =
         "\222\343\342 \242\250 \254\256\246\245\342\245 \247\254i\255\250\342\250 \342\250\257 \245\252\340\240\255\343.",
         TEXT_STYLE_NORMAL
     },
-    {   8,
+    {
+        8,
         10,
          "\x07  \215\240\342\250\341\252\240\251\342\245 \252\253\240\242i\350i \202\202\205\220\225 \342\240 \202\215\210\207 \244\253\357 \242\250\241\256\340\343 \257\256\342\340i\241\255\256\243\256 \342\250\257\343 \254\256\255i\342\256\340\343",
          TEXT_STYLE_NORMAL
@@ -938,6 +939,112 @@ static MUI_ENTRY ukUASelectPartitionEntries[] =
     }
 };
 
+static MUI_ENTRY ukUAChangeSystemPartition[] =
+{
+    {
+        4,
+        3,
+        " ReactOS " KERNEL_VERSION_STR " Setup ",
+        TEXT_STYLE_UNDERLINE
+    },
+    {
+        6,
+        8,
+        "The current system partition of your computer",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        12,
+        "on the system disk",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        16,
+        "uses a format not supported by ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        18,
+        "In order to successfully install ReactOS, the Setup program must change",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        19,
+        "the current system partition to a new one.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        21,
+        "The new candidate system partition is:",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        25,
+        "\x07  To accept this choice, press ENTER.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        27,
+        "\x07  To manually change the system partition, press ESC to go back to",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        28,
+        "   the partition selection list, then select or create a new system",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        8,
+        29,
+        "   partition on the system disk.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        32,
+        "In case there are other operating systems that depend on the original",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        33,
+        "system partition, you may need to either reconfigure them for the new",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        34,
+        "system partition, or you may need to change the system partition back",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        6,
+        35,
+        "to the original one after finishing the installation of ReactOS.",
+        TEXT_STYLE_NORMAL
+    },
+    {
+        0,
+        0,
+        "ENTER = Continue   ESC = Cancel",
+        TEXT_TYPE_STATUS | TEXT_PADDING_BIG
+    },
+    {
+        0,
+        0,
+        NULL,
+        0
+    }
+};
+
 static MUI_ENTRY ukUAConfirmDeleteSystemPartitionEntries[] =
 {
     {
@@ -1382,7 +1489,6 @@ static MUI_ENTRY ukUASelectFSEntries[] =
         "ENTER = \217\340\256\244\256\242\246\250\342\250   ESC = \221\252\240\341\343\242\240\342\250   F3 = \202\250\251\342\250",
         TEXT_TYPE_STATUS | TEXT_PADDING_BIG
     },
-
     {
         0,
         0,
@@ -1776,6 +1882,10 @@ MUI_PAGE ukUAPages[] =
         SELECT_PARTITION_PAGE,
         ukUASelectPartitionEntries
     },
+    {
+        CHANGE_SYSTEM_PARTITION,
+        ukUAChangeSystemPartition
+    },
     {
         CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
         ukUAConfirmDeleteSystemPartitionEntries

base/setup/usetup/usetup.c

@@ -1788,7 +1788,6 @@ SelectPartitionPage(PINPUT_RECORD Ir)
                 }
             }
 
-// FIXME TODO: PartitionList->SystemPartition is not yet initialized!!!!
             if (CurrentPartition == PartitionList->SystemPartition ||
                 IsPartitionActive(CurrentPartition))
             {
@@ -2693,7 +2692,7 @@ ResetFileSystemList(VOID)
  *
  * SIDEEFFECTS
  *  Calls UpdatePartitionType()
- *  Calls CheckActiveSystemPartition()
+ *  Calls FindSupportedSystemPartition()
  *
  * RETURNS
  *   Number of the next page.
@@ -2722,14 +2721,172 @@ SelectFileSystemPage(PINPUT_RECORD Ir)
     /* Find or set the active system partition when starting formatting */
     if (FormatState == Start)
     {
-        /* Find or set the active system partition */
+        /*
-        CheckActiveSystemPartition(PartitionList,
+         * If we install on a fixed disk, try to find a supported system
-                                   FALSE,
+         * partition on the system. Otherwise if we install on a removable disk
-                                   InstallPartition->DiskEntry,
+         * use the install partition as the system partition.
-                                   InstallPartition);
+         */
-        if (PartitionList->SystemPartition == NULL)
+        // TODO: Include that logic inside the FindSupportedSystemPartition() function?
+        if (InstallPartition->DiskEntry->MediaType == FixedMedia)
         {
-            /* FIXME: show an error dialog */
+            SystemPartition = FindSupportedSystemPartition(PartitionList,
+                                                           FALSE,
+                                                           InstallPartition->DiskEntry,
+                                                           InstallPartition);
+            /* Use the original system partition as the old active partition hint */
+            PartEntry = PartitionList->SystemPartition;
+
+            if ( SystemPartition && PartitionList->SystemPartition &&
+                (SystemPartition != PartitionList->SystemPartition) )
+            {
+                DPRINT1("We are using a different system partition!!!!\n");
+
+                MUIDisplayPage(CHANGE_SYSTEM_PARTITION);
+
+                {
+                PPARTENTRY PartEntry; // Shadow variable
+
+                PartEntry = PartitionList->SystemPartition;
+                DiskEntry = PartEntry->DiskEntry;
+
+                /* Adjust partition size */
+                PartSize = PartEntry->SectorCount.QuadPart * DiskEntry->BytesPerSector;
+                if (PartSize >= 10 * GB) /* 10 GB */
+                {
+                    PartSize = PartSize / GB;
+                    PartUnit = MUIGetString(STRING_GB);
+                }
+                else
+                {
+                    PartSize = PartSize / MB;
+                    PartUnit = MUIGetString(STRING_MB);
+                }
+
+                /* Adjust partition type */
+                GetPartTypeStringFromPartitionType(PartEntry->PartitionType,
+                                                   PartTypeString,
+                                                   ARRAYSIZE(PartTypeString));
+
+                if (*PartTypeString == '\0') // STRING_FORMATUNKNOWN ??
+                {
+                    CONSOLE_PrintTextXY(8, 10,
+                                        MUIGetString(STRING_HDDINFOUNK4),
+                                        (PartEntry->DriveLetter == 0) ? '-' : (CHAR)PartEntry->DriveLetter,
+                                        (PartEntry->DriveLetter == 0) ? '-' : ':',
+                                        PartEntry->PartitionType,
+                                        PartSize,
+                                        PartUnit);
+                }
+                else
+                {
+                    CONSOLE_PrintTextXY(8, 10,
+                                        "%c%c  %s    %I64u %s",
+                                        (PartEntry->DriveLetter == 0) ? '-' : (CHAR)PartEntry->DriveLetter,
+                                        (PartEntry->DriveLetter == 0) ? '-' : ':',
+                                        PartTypeString,
+                                        PartSize,
+                                        PartUnit);
+                }
+
+
+                /* Adjust disk size */
+                DiskSize = DiskEntry->SectorCount.QuadPart * DiskEntry->BytesPerSector;
+                if (DiskSize >= 10 * GB) /* 10 GB */
+                {
+                    DiskSize = DiskSize / GB;
+                    DiskUnit = MUIGetString(STRING_GB);
+                }
+                else
+                {
+                    DiskSize = DiskSize / MB;
+                    DiskUnit = MUIGetString(STRING_MB);
+                }
+
+                CONSOLE_PrintTextXY(8, 14, MUIGetString(STRING_HDINFOPARTZEROED_1),
+                                    DiskEntry->DiskNumber,
+                                    DiskSize,
+                                    DiskUnit,
+                                    DiskEntry->Port,
+                                    DiskEntry->Bus,
+                                    DiskEntry->Id,
+                                    &DiskEntry->DriverName,
+                                    DiskEntry->DiskStyle == PARTITION_STYLE_MBR ? "MBR" :
+                                    DiskEntry->DiskStyle == PARTITION_STYLE_GPT ? "GPT" :
+                                                                                  "RAW");
+
+
+                PartEntry = SystemPartition;
+                DiskEntry = PartEntry->DiskEntry;
+
+                /* Adjust partition size */
+                PartSize = PartEntry->SectorCount.QuadPart * DiskEntry->BytesPerSector;
+                if (PartSize >= 10 * GB) /* 10 GB */
+                {
+                    PartSize = PartSize / GB;
+                    PartUnit = MUIGetString(STRING_GB);
+                }
+                else
+                {
+                    PartSize = PartSize / MB;
+                    PartUnit = MUIGetString(STRING_MB);
+                }
+
+                /* Adjust partition type */
+                GetPartTypeStringFromPartitionType(PartEntry->PartitionType,
+                                                   PartTypeString,
+                                                   ARRAYSIZE(PartTypeString));
+
+                if (*PartTypeString == '\0') // STRING_FORMATUNKNOWN ??
+                {
+                    CONSOLE_PrintTextXY(8, 23,
+                                        MUIGetString(STRING_HDDINFOUNK4),
+                                        (PartEntry->DriveLetter == 0) ? '-' : (CHAR)PartEntry->DriveLetter,
+                                        (PartEntry->DriveLetter == 0) ? '-' : ':',
+                                        PartEntry->PartitionType,
+                                        PartSize,
+                                        PartUnit);
+                }
+                else
+                {
+                    CONSOLE_PrintTextXY(8, 23,
+                                        "%c%c  %s    %I64u %s",
+                                        (PartEntry->DriveLetter == 0) ? '-' : (CHAR)PartEntry->DriveLetter,
+                                        (PartEntry->DriveLetter == 0) ? '-' : ':',
+                                        PartTypeString,
+                                        PartSize,
+                                        PartUnit);
+                }
+
+                }
+
+                while (TRUE)
+                {
+                    CONSOLE_ConInKey(Ir);
+
+                    if (Ir->Event.KeyEvent.wVirtualKeyCode == VK_RETURN) /* ENTER */
+                    {
+                        break;
+                    }
+                    else if (Ir->Event.KeyEvent.wVirtualKeyCode == VK_ESCAPE)  /* ESC */
+                    {
+                        return SELECT_PARTITION_PAGE;
+                    }
+                }
+
+                CONSOLE_ClearScreen();
+                CONSOLE_Flush();
+            }
+        }
+        else // if (InstallPartition->DiskEntry->MediaType == RemovableMedia)
+        {
+            SystemPartition = InstallPartition;
+            /* Don't specify any old active partition hint */
+            PartEntry = NULL;
+        }
+
+        if (!SystemPartition)
+        {
+            /* FIXME: improve the error dialog */
             //
             // Error dialog should say that we cannot find a suitable
             // system partition and create one on the system. At this point,
@@ -2737,9 +2894,14 @@ SelectFileSystemPage(PINPUT_RECORD Ir)
             // or use an external drive as the system drive/partition
             // (e.g. floppy, USB drive, etc...)
             //
-            return QUIT_PAGE;
+            PopupError("The ReactOS Setup could not find a supported system partition\n"
+                       "on your system or could not create a new one. Without such partition\n"
+                       "the Setup program cannot install ReactOS.\n"
+                       "Press ENTER to return to the partition selection list.",
+                       MUIGetString(STRING_CONTINUE),
+                       Ir, POPUP_WAIT_ENTER);
+            return SELECT_PARTITION_PAGE;
         }
-        SystemPartition = PartitionList->SystemPartition;
 
         /*
          * If the system partition can be created in some
@@ -2760,6 +2922,13 @@ SelectFileSystemPage(PINPUT_RECORD Ir)
             }
         }
 
+        /* Set it as such */
+        if (!SetActivePartition(PartitionList, SystemPartition, PartEntry))
+        {
+            DPRINT1("SetActivePartition(0x%p) failed?!\n", SystemPartition);
+            ASSERT(FALSE);
+        }
+
         /* Commit all partition changes to all the disks */
         if (!WritePartitionsToDisk(PartitionList))
         {

base/setup/usetup/usetup.h

@@ -97,6 +97,7 @@ typedef enum _PAGE_NUMBER
     CREATE_PRIMARY_PARTITION_PAGE,
     CREATE_EXTENDED_PARTITION_PAGE,
     CREATE_LOGICAL_PARTITION_PAGE,
+    CHANGE_SYSTEM_PARTITION,
     CONFIRM_DELETE_SYSTEM_PARTITION_PAGE,
     DELETE_PARTITION_PAGE,