[Raging Idiot]

I would start by updating all your drivers one at a time and see if it fixes the problem. I know your video drivers are a little out of date. You may want to check the sound card also.

Have you run this game without problems before or have you always had this problem since you first installed it?

When the game crashes does your whole computer crash or can you recover and keep working? In my experience a computer overheating will completely fail not just crash to desktop.

If all else fails try uninstalling and reinstall.