This is the same error I was getting when crashing. It would lag right before crashing (typically about 15 minutes in I would crash). I PM'd you the link to the fix that worked, but for those that are experiencing the same problems here is the link:
Thanks everyone, especially your advice Tac. I went with Conq's link as it was easier and less reading. If it does not fix the problem I will consider TWC's fix.