I have a computer that I am working on and I can not figure out what is going on any suggestions would be appreciated. Here is the situation It is a desktop running Windows XP. When I turn it on I get this BSOD message at the XP loading screen. IRQ_NOT_EQUAL_OR_LESS STOP: 0x0000007A ATAPI.SYS (Base at ......) I can get the computer the boot into safe mode. I run msconfig and set it to diagnostic startup and restart. I get the same error message when I try to boot normally. I ran the memtest86+ boot disc to check the memory and it passed all test. I even went a step further and removed each stick of RAM and tried starting the computer. Still get the same bsod. I also ran Active Disk boot disc (http://www.livecd.com/) and scanned the hard drive for bad sectors and it passed the test. Also interesting was that the Active boot disc was the only one I could get to start. Hirens boot disc would throw a bsod quickly and restart. Kaspersky Rescue CD would shut down the computer when I tried to start it. Avira Rescue Cd would freeze at "Loading Linux Kernel". I even tried unplugging the Hard drive from the mother board and get the same results. Im not sure what this means. The Windows XP recovery disc will boot as well but that is it. I have tried unplugging all the cdrom drives from the motherboard and even unplugged the tv card that is installed and I still get the same BSOD on startup. The Tv Card is the only card to unplug as the video,audio and network are all onboard. I have tried booting into safe mood and running sfc \scannow. But it will not run. It gives me an error that the RPC service is not running. When I check it is running though. As far as virus scans while booted into safe mode I scanned with Emisofts Anti-Malware. It came up with 1 and it was a toolbar of some kind and that's it. Im not sure what to think of this. I am beginning to think it is the motherboard but I am not certain. Any suggestions would be appreciated. Thanks!