It will just freeze up, I will either get all graphical distortions on the screen, or the screen will go black. Also, sound in the background gets "stuck" on a 1 sec -ish loop until I reboot. It happens in CS too, but there I can usually cntrl-alt-del it, look at the task manager for a moment, then go back in and its fine. I think its something to do with my graphics card, but I cant be 100% yet... Any help is greatly appreciated!!