Windows Blue Screen ERROR

Windows XP could not start
because the following file is missing or corrupt:
\WINDOWS\SYSTEM32\CONFIG\SYSTEM

To complete part one, follow these steps:

1. Insert the
   Windows XP startup disk into the floppy disk drive, or insert the Windows
   XP CD-ROM into the CD-ROM drive, and then restart the computer.
   Click to select any options that are required to start the computer from
   the CD-ROM drive if you are prompted to do so.
2. When the
   "Welcome to Setup" screen appears, press R to start the Recovery
   Console.
3. If you have
   a dual-boot or multiple-boot computer, select the installation that you
   want to access from the Recovery Console.
4. When you are
   prompted to do so, type the Administrator password. If the administrator
   password is blank, just press ENTER.
5. At the
   Recovery Console command prompt, type the following lines, pressing ENTER
   after you type each line:

md tmp
copy c:\windows\system32\config\system c:\windows\tmp\system.bak
copy c:\windows\system32\config\software c:\windows\tmp\software.bak
copy c:\windows\system32\config\sam c:\windows\tmp\sam.bak
copy c:\windows\system32\config\security c:\windows\tmp\security.bak
copy c:\windows\system32\config\default c:\windows\tmp\default.bak

delete c:\windows\system32\config\system
delete c:\windows\system32\config\software
delete c:\windows\system32\config\sam
delete c:\windows\system32\config\security
delete c:\windows\system32\config\default

copy c:\windows\repair\system c:\windows\system32\config\system
copy c:\windows\repair\software c:\windows\system32\config\software
copy c:\windows\repair\sam c:\windows\system32\config\sam
copy c:\windows\repair\security c:\windows\system32\config\security
copy c:\windows\repair\default c:\windows\system32\config\default


Type exit to
quit Recovery Console. Your computer will restart.