Index: /trunk/src/VBox/Main/src-client/GuestProcessImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/GuestProcessImpl.cpp	(revision 84253)
+++ /trunk/src/VBox/Main/src-client/GuestProcessImpl.cpp	(revision 84254)
@@ -1113,5 +1113,5 @@
 
     /* Prepare environment.  The guest service dislikes the empty string at the end, so drop it. */
-    size_t  cbEnvBlock;
+    size_t  cbEnvBlock = 0; /* Shut up MSVC. */
     char   *pszzEnvBlock;
     if (RT_SUCCESS(vrc))