diff --git a/dlls/gdi32/dibdrv/dc.c b/dlls/gdi32/dibdrv/dc.c
index 0ff4688b17002a15b444d0d02f5ca62a2feeb563..413ba8b866588e50b7f6901b68311e667330dce0 100644
--- a/dlls/gdi32/dibdrv/dc.c
+++ b/dlls/gdi32/dibdrv/dc.c
@@ -745,13 +745,13 @@ static inline void lock_surface( struct windrv_physdev *dev )
 {
     GDI_CheckNotLock();
     dev->surface->funcs->lock( dev->surface );
-    if (is_rect_empty( dev->dibdrv->bounds )) dev->start_ticks = GetTickCount();
+    if (is_rect_empty( dev->dibdrv->bounds )) dev->start_ticks = NtGetTickCount();
 }
 
 static inline void unlock_surface( struct windrv_physdev *dev )
 {
     dev->surface->funcs->unlock( dev->surface );
-    if (GetTickCount() - dev->start_ticks > FLUSH_PERIOD) dev->surface->funcs->flush( dev->surface );
+    if (NtGetTickCount() - dev->start_ticks > FLUSH_PERIOD) dev->surface->funcs->flush( dev->surface );
 }
 
 static void CDECL unlock_bits_surface( struct gdi_image_bits *bits )
diff --git a/dlls/gdi32/driver.c b/dlls/gdi32/driver.c
index 712dce06af663e87ac6e1b04022bdd9c344c1bf1..f9cf592b28ebeb87bb4a109458920ea6001597ce 100644
--- a/dlls/gdi32/driver.c
+++ b/dlls/gdi32/driver.c
@@ -235,7 +235,7 @@ void CDECL __wine_set_display_driver( HMODULE module )
     if (!(driver = create_driver( module )))
     {
         ERR( "Could not create graphics driver\n" );
-        ExitProcess(1);
+        NtTerminateProcess( GetCurrentThread(), 1 );
     }
     if (InterlockedCompareExchangePointer( (void **)&display_driver, driver, NULL ))
         HeapFree( GetProcessHeap(), 0, driver );
diff --git a/dlls/gdi32/gdiobj.c b/dlls/gdi32/gdiobj.c
index cf8fbb8ebb49a7eae4d719c46b8bda1603474076..9c62e9e62d1970e74f0e80ffb79bfab19cb86c3c 100644
--- a/dlls/gdi32/gdiobj.c
+++ b/dlls/gdi32/gdiobj.c
@@ -885,7 +885,7 @@ void GDI_CheckNotLock(void)
     if (RtlIsCriticalSectionLockedByThread(&gdi_section))
     {
         ERR( "BUG: holding GDI lock\n" );
-        DebugBreak();
+        assert( 0 );
     }
 }
 
diff --git a/dlls/gdi32/printdrv.c b/dlls/gdi32/printdrv.c
index 9a4ad3b5c231d59d13ebbef2eb95aed1a211bb55..152b43d6ae426a9e127ac28bdab5ee290a761c53 100644
--- a/dlls/gdi32/printdrv.c
+++ b/dlls/gdi32/printdrv.c
@@ -39,10 +39,14 @@ WINE_DEFAULT_DEBUG_CHANNEL(print);
  */
 DWORD WINAPI NtGdiGetSpoolMessage( void *ptr1, DWORD data2, void *ptr3, DWORD data4 )
 {
-    TRACE("(%p 0x%x %p 0x%x) stub\n", ptr1, data2, ptr3, data4);
+    LARGE_INTEGER time;
+
+    TRACE( "(%p 0x%x %p 0x%x) stub\n", ptr1, data2, ptr3, data4 );
+
     /* avoid 100% cpu usage with spoolsv.exe from w2k
       (spoolsv.exe from xp does Sleep 1000/1500/2000 in a loop) */
-    Sleep(500);
+    time.QuadPart = 500 * -10000;
+    NtDelayExecution( FALSE, &time );
     return 0;
 }