So I got my Sata hardrive problem worked out. And I figured out my Cpu running hotter problem (it was the program, the bios has the right temp). But yesterday, I kept getting system instability and BSODs. Like every 10 minutes or so I'd randomly get a BSOD for a split second (so I couldn't see what it was about), then comp restart. So it kept doing that and I'm freakin'. So I backup my external drive with all my important files and prepare for the worst. I ran Registerybooster 2 kind of as a last ditch effort. And had a ton of errors and repaired them all. Then my computer was working normal. I hadn't had any instability problems for hours after that.

      So I was bored and forgot that I recently installed Mass Effect (i still hadn't gotten around to installing all my old stuff since I got my Sata). I start her up and it gets to the loading screen and it's taking forever. It's never taken long before. I do Ctl+Alt+Del and I can sort of see the Task Manager. It's like it hidden by the loading screen. The game hadn't locked up or anything, the loading animation was still running. I ejected the disk hoping it'd close and pop up a disc error. Then I finally just restarted my computer.

      Computer started up and got to the Windows Logo. After 4.5 passes on the Windows loading bar thing it froze for about a second, then flashed the BSOD for a split second and restarted. I tried 'Start Windows Normally', 'Last Known Good Configuration' and even 'Safe Mode'. But it always froze at the 4.5 pass of the loading bar, flashed the BSOD, and restarted. So I got my Xp disc and decided to just repair Windows. I pop the thing in and set my cdrom to boot first. It goes through the loading files part. Then says basically 'Windows isn't installed on this system'. The partitioned drive was 305 gigs, which is the same amount it was when I first put in my Sata hardrive. So the thing got wiped somehow. Like wtf? Any ideas?

Last night in reinstalled windows and all the stuff I needed like Firefox, internet, graphic and motherboard drivers, AVG, etc. Everything's working, except I ran a scan with AVG at 7:00 this morn and I checked when I woke up and AVG had an error and had to close. I'm just confused and don't want to have to go through that crap again. Could it have been a virus of somekind? Faulty drivers? Faulty programs?

Run Trojan Remover. It's the best antiviral program on the market. If that doesn't come up with anything, install the latest drivers for all of your system software and tell us if anything else comes up.

Ran it, came up clean. Nothings happened since I reinstalled windows. I installed the latest drivers. I don't know what the problem was before I reinstalled windows. Like at first I thought maybe it was a bad driver or something wrong with my ram or something. But when it was BSODing 10 minutes after booting, I opened up safe mode and ran avg for a long time with no problems, then started browsing around looking at device manager and stuff. Then I clicked on something arbitrary and it froze for a second then restarted.

That's really odd, and I have a really odd solution that worked in a somewhat similar problem I had but likely won't work in your case. I'll present how I fixed my problem anyway.

My computer randomly froze one day while I was burning a CD, listening to music, and browsing the web at the same time. Apparently this is REALLY HARD on a 2.4 ghz single core athlon 64 (or my motherboard... not sure which), so the computer eventually locked up to the point where the music would repeat like .01 second of music over and over to the point where it sounded like a tone.

I restarted my computer and couldn't boot into XP. The loading indicator bar would freeze indefinitely after several seconds and I'd be forced to reboot.

I eventually got back into Windows XP, but not before disabling USB functionality. I was like, "huh, most peculiar". I rebooted and re-enabled my USB ports and Windows started up this time with them. Something was wrong, however; my USB ports had magically been downgraded to USB 1.1. It's the most bizarre thing but the whole-hearted truth. After installing Vista, my USB ports were still 'downgraded' so my motherboard was the problem. I just recently upgraded my motherboard and the problem went away with the upgrade.

Eh, moral of the story... I don't know. Like I said, probably won't fix your problem but it was a quirky story.

EDIT: Also I'm surprised no one suggested this yet but after re-reading your story I would not be surprised if you have a bad stick of RAM in your computer. Take all sticks out but 1 and run it off that and see if your stability is fixed. Then swap and test again. You may find you have a bad stick.

Idk. I mean after I reinstalled windows last night everything's working perfectly again. No BSODs or random restarts. If it were the RAM you'd think it would keep doing it, and at the same rate it had been.

Oh, okay that's good to hear. XP must have been a bit corrupted then, eh? (shit like this is honestly why I upgraded to Vista ASAP)

I'll take two or three repair installs a year over Vista any day of the week

Sounds like it could be a dying hard drive. Especially if suddenly it was empty. Usually the rule of thumb with BSOD's is if you reinstalled Windows and they're still happening it's unlikely it's a software problem (possibly could be software/drivers you install again after reinstalling Windows). I'd another HDD (no harm in more space!) or disable all programs that start up when your pc does. Start -> Run -> Msconfig -> Selective Startup -> uncheck load start up items. Then update all your drivers to the latest. Run it for a bit like that and see if it's still blue screening. If so it's even more likely it's a hardware problem.