I have a system with a 466 celeron, 640Mg ram, and 10 gig hard drive. After trying to setup a printer I ran into the "pci.sys" is missing or corrupt. Normally I would just run thew repair to fix. But this time when starting repair on XP PRo I am getting cannot load setupdd.sys error code 4. I ran diagnostics on Hard drive and they past. Why would i get this error code on running repair. In fact I had not even gotten to the point of hitting "r" for repair. It was when the CD was loading Debugger.dll. The next time I got error 7 cannot load ntkrnlmp.exe. I used 3 XP disks and these came up. Any ideas around this. I really need to save this hard drive and the data on it.