I have a messed up Master Boot Record with possible bad sectors. I tried using CHKDSK with the /F and also the /P And /R parameters. Didn't work. Also i tried formatting it twice with the XP installation CD. Also i tried fixing the Master Boot Record by creating a new one with the FIXMBR. Same thing. No luck with that either. After like 20 to 30 minutes while im playing a game the PC shuts down by itself, also it sounds like a HD problem cause they are still spinning. Im guessing a bad sector. Also my scandisk shows i have sector errors also. Ohh and while im not playing a game my PC will get a BSOD. This started to happen just a few days ago so I can't remember what the BSOD exactly said. But from what I can remember it sounded like a HD problem or RAM problem. But then if i had a RAM problem my PC wouldn't boot for crap.