Okay, I've got a huuuuuge problem, that I'd just love to fix I hope you guys have some idea what's going on First off, specs: -p4 processor, 3ghz -asus p5ld2 deluxe mobo -nvidia 6600gt graphics card, overclocked to hell and back -big ass cooling fans on everything, so heat is not the answer. -WD caviar 7200 rpm hd, 80 gb, bought it OEM -Antec (I think?) power supply, either 420 or 500w. -2 gigs of corsair valueram, ddr2 533 -windows XP Professional (a genuine copy, even!) On my desktop, just about every time I watch a video on firefox, seemingly regardless of what kind of plugin it is, it'll get about halfway through, then click and my computer restarts. As if I had literally went to the start bar and shut it down, then restarted it. It fucking sucks. A couple weeks ago I had a problem with the MFT that caused me to reformat the entire computer. Since I've done so, this problem started manifesting itself. I don't know what's wrong with my shit! The hard drive has always made little scratching noises loud enough to hear clearly. I'm not sure if this is a factor, but I thought it might be, and if it is, i'll just get a new HD. Now's the time, before I bother installing new shit. Any ideas guys?