i just built this computer about 2 and a half months ago and all has been well. ive been playing games like half-life2 and oblivion and everything was fine. then a few days ago i bought vanguard and i was playing it for 2-3 hours straight yesterday and the day before and everything was fine but then all of a sudden today i was playing for about a half an hour and my computer just shut down and made the beep code for cpu overheating. anyone have any suggestions as to why it can go from all is well to cpu overheating in one day?