diff --git "a/win32ss/user/ntuser/painting.c" "b/win32ss/user/ntuser/painting.c"
index e6fb2d6831f..83a3dff41a6 100644
--- "a/win32ss/user/ntuser/painting.c"
+++ "b/win32ss/user/ntuser/painting.c"
@@ -698,6 +698,14 @@ IntInvalidateWindows(PWND Wnd, PREGION Rgn, ULONG Flags)
       RgnType = NULLREGION;
    }
 
+   /* Nothing to paint, just return */
+   if ((RgnType == NULLREGION &&
+       (Flags & RDW_INVALIDATE)) ||
+       RgnType == ERROR)
+   {
+      return;
+   }
+
    /*
     * Save current state of pending updates
     */