I am having the same issue. My game shuts down and goes back to the Windows XP desktop. It does NOT shut down my entire computer like so many seem to be having. I'm not sure if it's a memory issue or something else. Any suggestions? I'd really like to play the game, but having to save every 7 seconds is a bit tedious.
I think it's a memory issue. Turns out one of my 512 chips is bad. We replaced it with a 256 which makes me at 75% of the required memory. If the RAM isn't high enough, would that cause the game to shut down and go back to Windows? The computer itself isn't shutting off, so I don't think it's a heat issue. What do you think?