Index: /trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest.cpp
===================================================================
--- /trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest.cpp	(revision 41648)
+++ /trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest.cpp	(revision 41649)
@@ -580,5 +580,5 @@
     if (fInflate)
     {
-        rc = RTR0MemObjLockUser(pMemObj, u64ChunkAddr, VMMDEV_MEMORY_BALLOON_CHUNK_SIZE,
+        rc = RTR0MemObjLockUser(pMemObj, (RTR3PTR)u64ChunkAddr, VMMDEV_MEMORY_BALLOON_CHUNK_SIZE,
                                 RTMEM_PROT_READ | RTMEM_PROT_WRITE, NIL_RTR0PROCESS);
         if (RT_SUCCESS(rc))
@@ -2684,5 +2684,7 @@
             if (fEvents & VMMDEV_EVENT_MOUSE_POSITION_CHANGED)
             {
+#ifndef RT_OS_WINDOWS
                 MouseNotifyCallback = pDevExt->MouseNotifyCallback;
+#endif
                 fMousePositionChanged = true;
                 fEvents &= ~VMMDEV_EVENT_MOUSE_POSITION_CHANGED;