My computer was working relatively fine for like one year, got BSOD the odd time, but a couple of days ago it got a BSOD and when I tried to reboot it said some windows system file was missing or corrupt so I thought it might be a virus or something, so I tried to reinstall Win XP pro but it kept getting blue-screen of death's at various places during the installation. I tried like 10 times, and each blue screen had a different error except it would say "IRQL not less or equal" about 25% of the time. Ok so I thought my memory was screwed so I returned it and got a new stick, put it in, same thing. Next I formated my HD and tried again, same thing. I did try installing Windows Me and it worked fairly well but it still got an error on installation and errors in Windows. Here's my system specs AMD Athalon 1GHZ ECS K7S5A mobo 256 MB PC-2100 DDR RAM 40Gb Quantum fireball HD Geforce 2 graphics card Anyone have any idea what is going on?