This started happening to me yesterday while I was in World of Warcraft. First it started off as a freeze and then I had to hard-reset my PC. I got back in and every time I tried to open a game, program, anything it would reset itself. So, I go into System and turned off the auto-restart on Fatal Error thing. Upon rebooting, I get the "DRIVER_IRQL_NOT_LESS_OR_EQUAL" message. After stripping the machine down card-by-card and testing the bare machine, to the full machine, nothing works. I also went into safe mode and un-installed, then re-installed my GeForce drivers. It seemed to work for a while, then started doing it again with the SAME error. So I went from thinking it was a Hardware issue, to now thinking it's a Software issue. I can run safemode for an infinite amount of time, no crashing, nothing. I've ran memory tests, scanned the disk, went and done all the usual things someone would do in this situation. I have also disabled my anti-virus to check if that was it (I had googled someone having their anti-virus messing with it.) - I also popped in my old GeForce 440 MX and got the same problems. Now whenever I try to get into Windows it finishes loading everything and then powers itself off (sort of) but the front of my PC, Power supply, and fans are all still on. It's like it turned the hard drives off. - I'm 100% sure the power supply is good, I'm 100% sure the hard drives are good (I use the master for windows, slave for files, ect.) - I've tried unplugging all the USB devices minus my keyboard, nothing is working. I was blaming my video card at first since it was the only part of my PC I bought on budget, the machine is only a couple years old. Here's my system specs: AMD Athlon 64 3200+ Master Power 520w ATX Power Supply ASRock K8 Upgrade Motherboard w/ Future Port nVidia Geforce 6200 HDD 1: Maxtor 7200rpm 45gb (Windows Drive) HDD 2: Maxtor 7200rpm 200gb (File Drive) I ruled out overheating, ect. - Not sure what else it could be at this point, so I'm posting it here. I'm almost sure it's something to do with the drivers for my card, but it stopped giving me that BSOD, now it just does the weird power-off thing instead. Thanks for any help.