Drive if error code is error code no; config; system%systemroot%; windows; system32, and then all the connectors clean and then plug in. Restart if there is no CD-ROM to start or remove the hard disk to another machine to see what is not a hardware is not driven; config; sam%systemroot%, that is the soft issues; windows; system32, may be the original illegal shutdown caused; config; repair file directory for the file%systemroot%,%systemroot%. Take a system disk; system32, into the recovery control platform (R) - chkdsk/software%systemroot% input, if any; system32; windows; config; config; system32, try again or if not; windows; security%systemroot%; R (hard disk error recovery tool) and will explain at least one error volume is restored