Use the Windows Setup floppy disks or the Windows CD-ROM to start your computer. At the "Welcome to Setup" screen, press F10 or press 'R" to repair.
CHKDSK
chkdsk drive /p /r
The chkdsk command checks the specified drive and repairs or recovers the drive if the drive requires it.The command also marks any bad sectors and it recovers readable information.
You can use the following options:
/p : Does an exhaustive check of the drive and corrects any errors.
/r : Locates bad sectors and recovers readable information.
Note If you specify the /r option, the /p option is implied. When you specify the chkdsk command without arguments, the command checks the current drive with no options in effect.
When you run the chkdsk command, you are required to use the Autochk.exe file. CHKDSK automatically locates this file in the startup folder. If the Command Console was preinstalled, the startup folder is typically the Cmdcons folder. If CHKDSK cannot find Autochk.exe in the startup folder, CHKDSK tries to locate the Windows CD-ROM installation media. If it cannot find the installation media, CHKDSK prompts you for the location of the Autochk.exe file.