Index: /trunk/src/VBox/Runtime/r3/win/mp-win.cpp
===================================================================
--- /trunk/src/VBox/Runtime/r3/win/mp-win.cpp	(revision 46636)
+++ /trunk/src/VBox/Runtime/r3/win/mp-win.cpp	(revision 46637)
@@ -113,5 +113,5 @@
          * start with a guess and let windows advice us if it's too small.
          */
-        DWORD                                   cbSysProcInfo = _4K / 16;
+        DWORD                                   cbSysProcInfo = _4K;
         PSYSTEM_LOGICAL_PROCESSOR_INFORMATION   paSysInfo = NULL;
         BOOL                                    fRc = FALSE;