I built a new computer, as below, and had persistent problems with Windows shutting down, but the computer would remain running. I checked the RAM repeatedly with MEMTEST86. v4.0 64-bit and the RAM checked good each time. I checked all other programs for conflicts and found none.
I run SETI on all four (4) video cards in the rig, and I tried to keep it running 24-7. But that was impossible with Windows intermittently terminating, while the computer itself stayed ON.
MY RIG:
1 - Thermaltake Spedo VI90001N2Z case
1 - Silverstone Strider 1500-watt power supply
1 - Silverstone Strider 1200-watt power supply
1 - ASRock x58 Deluxe3 motherboard
1 - Intel i7-950 processor
1 - WIN 7 Pro 64-bit
6 - 2GB G.SKILL Trident 240-Pin DDR3 SDRAM DDR3 2000
4 - 140mm Masscool 1500 RPM fans
4 - 120mm Masscool 1500 RPM fans
3 - GTX 295 video cards
1 - GTX 275 video card
2 - Seagate Barracuda 160GB 7200 RPM SATA drives
2 - Seagate Barracuda 1TB 7200 RPM SATA drives
1 - AeroCool N6XT 6 Channel Fan Controller
1 - Sabrent seven (7) slot card reader
1 - DVD-ROM
1 - DVD-Writer
I started with nVidia driver 195.62 and upgraded to each new release. FINALLY, 197.13 solved the problem with persistent intermittent Windows shutdowns. It WAS the video driver(s). NOW it’s been on for two straight days without a Windows shutdown. Whereas before Windows would shutdown from two (2) to six (6) times daily.
FINALLY, finally… finally… nVidia got it right.