[Crpl. Crunch]

That used to happen to me a lot. So if you are just going to play the single player game do this... Before you start playing shut down all things running in the background with ctrl+alt+delete, Except EXPLORER and SYSTRAY. Then go to internet options and under the connections tab select NEVER DIAL A CONNECTION. That is what i did and my game never crashed after that. And you should be able to run it in normal mode too. I'm no computer expert, but that is what i did and it helped.