XP Pro Setup message said previous Windows 2000 files and DOS files are being deleted.. (Note: he bought computer 2nd hand and he has no recovery disk on previous Windows 2000) After that message the install he powered power down.. but reboot still stays with the same message: XP Pro Setup is stuck unable to go forward/backward;ERROR: Data Error (Cyclic redundancy check) Fatal error: One of the components that Windows needs to continue setup cannot be loaded.