Rebuilding the Windows Registry (Windows XP) -------------------------------------------- Use a Windows Recovery Disk to get to the DOS prompt via option R. md c:\windows\tmp cd c:\windows\system32\config copy system c:\windows\tmp\system.bak copy sam c:\windows\tmp\sam.bak copy security c:\windows\tmp\security.bak copy software c:\windows\tmp\software.bak copy default c:\windows\tmp\default.bak delete system delete sam delete security delete software delete default cd windows/repair copy system c:\windows\system32\config\system copy sam c:\windows\system32\config\sam copy security c:\windows\system32\config\security copy software c:\windows\system32\config\software copy default c:\windows\system32\config\default Reboot the computer into Windows. Restart the computer into Windows. Use Windows Explorer to delete c:\windows\tmp