Anyone else having problems using multiprocessing in AE CS6 with windows 8 shutting down rendering?

Multiprocessing and windows 7 worked fine on the same machine but when I upgraded to windows 8 it randomly shut down during rendering. I just updated my nvidia drivers everything else is updated too. I was able to do a full render of a 45 minute project after updating and thought the update fixed the problem. So I made some adjustments in the project and thought I would render it again to test it. Well it shut down the pc again with the same error of memory dump. Any ideas? Windows 8, Core i7 920, 24 gigs ram, nvidia GTX 470.