Well I been working on my friends system for sometime. When we ordered all the parts, I installed them and they worked fine, Installed XP, he was happy for a year and then out of no where it stopped working. So now I have his system and of course Physical First! So I checked all the cables, everything seems to be connected and well seated. So I begin to set up windows, First I was trying to install XP Pro and I could get all the way to where "copying files" are. It would either stop on shell32.dll or user32.dll. So I thought it might be a cd problem, tried another copy of windows, that was good, no scratches or anything. Still wouldent work. Even the hard drive was reset, works fine in my external HDD case. So after that I tried to install Vista, well it only got so far and gave me a fatal error. So I have no idea. I'm assuming its either the Hard drive or CD drive. Any ideas?