diff --git a/reactos/win32ss/gdi/ntgdi/device.c b/reactos/win32ss/gdi/ntgdi/device.c
index a6d6c73cb1c..7f9bd44c36e 100644
--- a/reactos/win32ss/gdi/ntgdi/device.c
+++ b/reactos/win32ss/gdi/ntgdi/device.c
@@ -28,12 +28,8 @@ IntGdiUnreferencePdev(PPDEVOBJ ppdev, DWORD CleanUpType)
 BOOL FASTCALL
 IntCreatePrimarySurface(VOID)
 {
-    SIZEL SurfSize;
-    SURFOBJ *pso;
-
     /* Create surface */
-    pso = &PDEVOBJ_pSurface(gppdevPrimary)->SurfObj;
-    SurfSize = pso->sizlBitmap;
+    PDEVOBJ_pSurface(gppdevPrimary);
 
     DPRINT("IntCreatePrimarySurface, gppdevPrimary=%p, gppdevPrimary->pSurface = %p\n",
         gppdevPrimary, gppdevPrimary->pSurface);
diff --git a/reactos/win32ss/gdi/ntgdi/gdiobj.c b/reactos/win32ss/gdi/ntgdi/gdiobj.c
index a5d75bba98c..2401d15875a 100644
--- a/reactos/win32ss/gdi/ntgdi/gdiobj.c
+++ b/reactos/win32ss/gdi/ntgdi/gdiobj.c
@@ -570,20 +570,18 @@ VOID
 NTAPI
 GDIOBJ_vReferenceObjectByPointer(POBJ pobj)
 {
-    ULONG cRefs;
-
     /* Check if the object has a handle */
     if (GDI_HANDLE_GET_INDEX(pobj->hHmgr))
     {
         /* Increase the handle's reference count */
         ULONG ulIndex = GDI_HANDLE_GET_INDEX(pobj->hHmgr);
         ASSERT((gpaulRefCount[ulIndex] & REF_MASK_COUNT) > 0);
-        cRefs = InterlockedIncrement((LONG*)&gpaulRefCount[ulIndex]);
+        InterlockedIncrement((LONG*)&gpaulRefCount[ulIndex]);
     }
     else
     {
         /* Increase the object's reference count */
-        cRefs = InterlockedIncrement((LONG*)&pobj->ulShareCount);
+        InterlockedIncrement((LONG*)&pobj->ulShareCount);
     }
 
     DBG_LOGEVENT(&pobj->slhLog, EVENT_REFERENCE, cRefs);
diff --git a/reactos/win32ss/gdi/ntgdi/xformobj.c b/reactos/win32ss/gdi/ntgdi/xformobj.c
index a4b0b185ef1..f2adad31b05 100644
--- a/reactos/win32ss/gdi/ntgdi/xformobj.c
+++ b/reactos/win32ss/gdi/ntgdi/xformobj.c
@@ -254,11 +254,6 @@ XFORMOBJ_iInverse(
     PMATRIX pmxDst, pmxSrc;
     FLOATOBJ foDet;
     XFORM xformSrc;
-    union
-    {
-        FLOAT Float;
-        LONG Long;
-    } eDet;
 
     pmxDst = XFORMOBJ_pmx(pxoDst);
     pmxSrc = XFORMOBJ_pmx(pxoSrc);
@@ -274,8 +269,6 @@ XFORMOBJ_iInverse(
         return DDI_ERROR;
     }
 
-    eDet.Long = FLOATOBJ_GetFloat(&foDet);
-
     /* Calculate adj(A) / det(A) */
     pmxDst->efM11 = pmxSrc->efM22;
     FLOATOBJ_Div(&pmxDst->efM11, &foDet);
diff --git a/reactos/win32ss/user/ntuser/monitor.c b/reactos/win32ss/user/ntuser/monitor.c
index 8e42309658b..e5b26877100 100644
--- a/reactos/win32ss/user/ntuser/monitor.c
+++ b/reactos/win32ss/user/ntuser/monitor.c
@@ -786,7 +786,6 @@ NtUserMonitorFromPoint(
     IN POINT pt,
     IN DWORD dwFlags)
 {
-    INT cMonitors;
     RECTL rc;
     HMONITOR hMonitor = NULL;
 
@@ -808,7 +807,7 @@ NtUserMonitorFromPoint(
     UserEnterShared();
 
     /* Find intersecting monitor */
-    cMonitors = IntGetMonitorsFromRect(&rc, &hMonitor, NULL, 1, dwFlags);
+    IntGetMonitorsFromRect(&rc, &hMonitor, NULL, 1, dwFlags);
 
     UserLeave();
     return hMonitor;
diff --git a/reactos/win32ss/user/ntuser/msgqueue.c b/reactos/win32ss/user/ntuser/msgqueue.c
index dde85a9314b..4aabd622c92 100644
--- a/reactos/win32ss/user/ntuser/msgqueue.c
+++ b/reactos/win32ss/user/ntuser/msgqueue.c
@@ -506,7 +506,6 @@ co_MsqInsertMouseMessage(MSG* Msg, DWORD flags, ULONG_PTR dwExtraInfo, BOOL Hook
 {
    LARGE_INTEGER LargeTickCount;
    MSLLHOOKSTRUCT MouseHookData;
-   PDESKTOP pDesk;
    PWND pwnd, pwndDesktop;
    HDC hdcScreen;
    PTHREADINFO pti;
@@ -550,7 +549,6 @@ co_MsqInsertMouseMessage(MSG* Msg, DWORD flags, ULONG_PTR dwExtraInfo, BOOL Hook
    /* Get the desktop window */
    pwndDesktop = UserGetDesktopWindow();
    if (!pwndDesktop) return;
-   pDesk = pwndDesktop->head.rpdesk;
 
    /* Check if the mouse is captured */
    Msg->hwnd = IntGetCaptureWindow();
diff --git a/reactos/win32ss/user/ntuser/winpos.c b/reactos/win32ss/user/ntuser/winpos.c
index 338a0a32214..6abc848032e 100644
--- a/reactos/win32ss/user/ntuser/winpos.c
+++ b/reactos/win32ss/user/ntuser/winpos.c
@@ -2056,7 +2056,7 @@ co_WinPosShowWindow(PWND Wnd, INT Cmd)
    LONG style;
    PWND Parent;
    PTHREADINFO pti;
-   BOOL ShowOwned = FALSE;
+   //  BOOL ShowOwned = FALSE;
    //  HRGN VisibleRgn;
 
    ASSERT_REFS_CO(Wnd);
@@ -2125,7 +2125,7 @@ co_WinPosShowWindow(PWND Wnd, INT Cmd)
             Swp |= SWP_SHOWWINDOW;
             if (!(style & WS_MAXIMIZE))
             {
-               ShowOwned = TRUE;
+               //ShowOwned = TRUE;
 
                Swp |= co_WinPosMinMaximize(Wnd, SW_MAXIMIZE, &NewPos) |
                       SWP_FRAMECHANGED;