I can launch the game and play just fine, but after a while there's a guaranteed crash with a "CRITICAL_PROCESS_DIED" message. It doesn't seem to happen under any other circumstance. I've uninstalled and reinstalled the game to different drive and the problem persists. I don't have any restore points to go back to and I really don't want to reinstall windows.
Memtest doesn't show any errors.
Chkdsk didn't come up with anything.
SFC didn't find any problems.
WhoCrashed seems to think the main problems are either ntoskrnl.exe or ntdll.sys.