I am working on a friends PC "Dell Deminsion 4400". He brought it to me with xp home on it. The issue was the system tray and all desktop functions were gone. You had to ctrl-alt-del use task manager and to run new process to get anything to run. I ran Spy Dr on it and found over 40'000 infections. THen i ran a trial version of symantec and it found 4 viruses. So i took it and slaved it to one of my hard drives and formatted it. THen i put it back in his pc (after cleaning the mass amounts of dust out) and tried to run the XP OS on it. Now during setup i get the error "Setup did not find any hard disk drives installed in your computer." I have tried EVERYTHING... even putting in my hard drive.. what else does this error mean... HELP!