I have Windows XP Professional installed on one of my old computers. Everytime I turn the computer on it runs through it's start up but then goes to a screen saying "Windows could not start because the following file is missing or corrupt: \windows\system32\config\system You can attempt to repair this file by starting Windows Setup using the originial Setup CD-Rom. Select 'r' at the first screen to start repair." I read that as saying I need to toss the windows xp cd-rom into the cd drive so that it can boot from it on start-up. Only problem is that it won't boot from the CD. I have the BIOS set so that the CD-Rom boots before the Hardrive but everytime I restart the computer with the windows cd in it won't boot from it. I unplugged the hard drive and booted up again and I got the same error message. This is telling me that the problem is occuring before the computer even gets to booting from devices. How could there be a windows error message without the Harddrive plugged in!?!? I'm sooo confused! Someone help!