Sorry to bump an old thread, but I have a similar problem with my computer. Basically I can't boot Windows XP if I have my graphics card drivers installed. I narrowed the problem down to two things: dodgy power supply or dodgy graphics card. It never occured to me that my CPU might be dodgy.
It's a long story, but here goes.. I've been using this computer since december with no problems like this. Then...
Friday
Installed CREATIVE AUDIGY 2 sound card Friday morning. Computer worked fine.
Friday evening I installed a 200GB 7200rpm SEAGATE HDD and replaced three 80mm CASE FANS (molex connectors) with 3 new 80mm CASE FANS with 3pin connectors connected to FAN CONTROLLER. Graphics quite literally ****ed - alternating black & white lines appear on screen, and then Windows restarts itself.
Removed fan controller. Added 3pin-molex converters to case fans. No change, graphics still ****ed.
Disconnected new HD. No change.
Reconnected new HD, disconnected old HD. Partitioned & installed Windows XP Home SP2. Installed motherboard drivers, restarted, installed graphics drivers, and got a 'ZERO DISPLAY SERVICE ERROR'. Restarted, same problem. Tried three different types of drivers, the latest ATI ones, the ones I was using before, and the OMEGA drivers. None worked.
Removed sound card and reinserted graphics card. No change.
Removed case fans. No change.
Tried a different monitor. No change.
Went to sleep.
Saturday & Sunday
Computer fairy did her magic (I don't have a ****ing clue -_-). Computer worked fine for the entire weekend with all my hardware connected (including the new HDD, case fans & sound card) and all drivers installed.
Monday
Worked fine Monday morning.
Got home from work Monday evening and was greeted by the same problem.
Removed video capture card. Problem gone. Fixed?
A few hours later, same problem.
Tweaked around with some nonessential BIOS settings (AGP fast write, aperture size, agp 8x toggle, HDD S.M.A.R.T, etc.). No change. Gave up.
Tuesday
Pretty much same as Monday. Worked in the morning, broken in the evening for about 30 minutes and then seemed to fix itself.
Wednesday
Worked fine in the morning and even worked fine in the evening. A few hours later, the computer hangs and I get the same problem again. Then for the rest of the evening Windows would manage to boot but then hang after a few minutes. The screen would freeze for a second or two and then go black. Strangely, the sound would still work (music still playing and even the media hotkeys worked) and I could even type things.
Thursday
Same problem for Thursday as Wednesday evening. Lasts about 5 minutes before hanging.
Friday & today
Back to original problem (funnily enough, the same as last friday). I've resorted to using my computer with no graphics card drivers installed. Basically just using the default Windows XP drivers, which are painfully slow at even 2D and can't manage 3D at all.
Notes
Booting Windows in Safe Mode always works.
KNOPPIX and Fedora Core 4 both work, but probably because they don't have the proper Radeon drivers installed.
CPU temperature varies on usage, average 40ish. Case temperature 30ish. Graphics card temp, last time I checked, 36ish.
Specs
AMD Athlon XP 3000 (default cooler)
MSI nForce 2 K7 (default 'safe' settings)
2x 512MB PC3200 (dual-channel disabled)
ATI Radeon 9600XT (AGP 8x & fast write enabled - cache video BIOS disabled - AGP aperture size 256MB)
Creative Audigy 2
Sony DVD+RW (connected to secondary master)
2x 7200RPM HDD (Seagate 200GB [primary master], Western Digital 120GB [primary slave])
1x 3.5" Floppy drive
3x 80mm case fans
1x HDD cooler (2x 50mm fans)
1x 400w power supply, 18a on +12v
Conclusion
...
:(
I don't think it's a problem with the CPU/mobo. I think it's a problem with the graphics card, but who knows...
edit: if it's of any use: