If you have PREC, then you have to delete it from your addon folder.

It also may be that your directx is messing with the game for whatever reason, dont know the technicalities, but you may have to add to your launch options:

-dxlevel 90


The steam forums are flooded with "My game crashed!" topics, so this has obviously affected many people (myself included)

So, sorry for making two topics in less than an hour. But I feel this needs to be said.