Started like a bad virus. Final fix, re-install att. HD wouldn't allow format. Now on boot, get "Disk read error, Ctrl/alt/del to restart" (Repeat) So," try CD install XP just to see, but get as far as "Press any key to install" then blank screen for as long as I keep it going. BIOS is default, and I do get "splash screen" etc. so it's not Vid card, but what is it? Probably HD, but, how to know for sure before I buy a new one? Can I do anything in DOS or any other way to make sure it's not the system? Any clues? Thanks. W/supply more info if needed.