This is not a Pandoras Box Problem. It is a Microsoft Problem.
We have narrowed it down to windows updates under MS bulliten MS13-057.
Specifically, on XP kb2834904 and on windows 7 kb2803821.
Please uninstall the Updates.
A lot of Compositing and Editing Systems have this Problem right now, as you can read here:
http://forums.adobe.com/message/5494175#5494175#5494175