@Fullmetal: According to HWmonitor, what is "fine"? You may want to go on the Hitman forums and see if anyone else is having issues.
[Edited by LiveFyre, 11/20/2012 6:20:21 PM]
It isn't just Hitman though. It has happened to me when I play Dishonored, X-COM, and the Assassins Creed games.
Found it. I am not seeing a stop error code though. It just says it wasn't properly shut down.
[Edited by fullmetal5550, 11/20/2012 6:59:37 PM]
I am checking the even logs though and it says something about Kernel Power errors.
[Edited by fullmetal5550, 11/20/2012 7:02:26 PM]
[Edited by Neo7, 11/20/2012 7:30:20 PM]