
I'm not Sure what could be causing your machine to freeze like that short of a bad install of the game or perhaps your video card drivers crashing. Check your application and system logs in the event viewer and it may give you an indication as to what's wrong.
One thing you can and should perhaps give a try is to start the game via Steam, (some people also use fraps) once you've done that you can configure steam to take screenshots and even save uncompressed copies to your hard drive.
One thing you can and should perhaps give a try is to start the game via Steam, (some people also use fraps) once you've done that you can configure steam to take screenshots and even save uncompressed copies to your hard drive.