If it happens again restore your gfx card to default if you still have it overclocked cause the same happened to me cause my processor wasn't set at the right voltage for the overclock. All my games would crash within an hour, bsods and lockups.
I had OC'd my 6850, but nothing extreme, just 815 GPU Clock & 1030 Mem Clock, it was running tons of games fine, didn't touch it and then this happened. It wasn't the OC it was the Steam DRM which has been fixed with a BIOS update.
glad you fixed it, hope you wont be as disappointed with the game as I am.
Thanks mate, but your disappointed with it? I've only completed the Prison mission and loving it, its a solid shooter with beautiful mechanics, the graphics aren't anything special but its the first decent looking game I've played in a while that has run absolutely perfectly, constantly 50fps and not a single stutter. It isn't as scary as I'd hoped so far, a lot of the 'scares' just seem like cheap tricks to try and get the player to jump, but in this day and age its pretty difficult to scare people in new ways.
So far its a lot scarier than Amnesia anyway, what a let down that was, but yeah, so far its just a solid shooter IMO. I'm not going into it expecting anything extreme, I picked it up for a fiver in a Steam deal and don't regret it one bit, wouldn't of regretted it if I had got it for the original £12.99 either. Shame its getting slated so much by everybody, its a lot better than Call of Duty, although I haven't tried the Multiplayer out yet, but its a better single player experience so far.