I'm on the brink of histeria. My computer crashed a few weeks ago, and after hundreds of dollars and many long hours it's still not working like it use to. I bought and installed a new motherboard, but the only way windows will boot up is if I set the proccessor down to 1250mhz. It's a AMD 2000xp chip, so it should run fine at 1600. But whenever I set the FSB from 100 to 133 windows gives me a lame "windows cannot run because some system file is corrupt". But if I keep it at 1250mhz it's fine. But windows runs noticeably slower and a few programs(such as AOL) won't work. Does anyone have an idea what might be wrong?