Windows XP BSOD 0xBE on startup; BSOD 0x7E booting off windows CD

A couple weeks ago, I started having intense problems with spyware. It caused my windows explorer to crash every 15 minutes or so and instantly relaunch explorer (not restart computer). When I ran AdAware/Spybot/Malwarebytes it would get rid of them and it just came back soon after. I kept putting off fixing it for good, but recently, when upon restarting the computer, it would get through loading Windows and would immediately bluescreen and force a restart.

I have not installed any new hardware in a year or so, and no new significant software for at least a month.

Attempted solutions:
- Run in safe mode. Similar to normal mode, right before windows actually pops up, blue screens to error "STOP: 0x000000BE"
- Boot off friend's XP Pro CD (remember I use XP Home - I can't find my disc anywhere). Makes it to "Launching Windows" then blue screens to error "STOP: 0x0000007E / pci.sys - Address F78E0BF base at F7487000, DateStamp 3b7d855c". Tried booting to CD multiple times.
- Boot off friend's Vista CD. Sometimes it blue screens to same XP CD error, and sometimes successfully launches to Vista screen at which point I don't continue.
- Booting with either of my 2 RAM sticks taken out.

Comp details:
Processor: Intel Core Duo CPU 3ghz
HDs: 1 SATA Hard drive (holds OS), 1 IDE just holding information. SATA has at least 50gb free, IDE has at least 2.
MB: nForce 790i ftw
RAM: GSkill 2gb DDR (x2)
Video Card: Geforce GTX260
CD/DVD drive
Windows XP Home SP3

Any help would be greatly appreciated.
 
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