ok so i started playing dd2 directors cut...played for a good hour....now every time i get to the playhouse where the ghosts are rehearsing my pc completely shuts down..not to windows..but turns off....ive monitored my temps and pcu is 45c and gpu 60...it always happens in that area...windows 7 4gb ram nvidia gtx 550ti athlon 7550 dual core 2.50 processor..any help please..