Fix Windows could not start because the following file is missing or corrupt

Description: "Windows could not start because the following file is missing or corrupt C: \ windows \ system32 \ config \ system". After entering the DOS screen, at the DOS prompt, type the following command: copy c: \ windows \ repair \ system c: \ windows \ system32 \ config \ system Press the Yes button to allow overwriting the system file, followed by the exit command to reboot the machine and enter Win as normal. The repair process is complete

"Windows could not start because the following file is missing or corrupt C: \ windows \ system32 \ config \ system".
After entering the DOS screen, at the DOS prompt, type the following command:
copy c: \ windows \ repair \ system c: \ windows \ system32 \ config \ system
Press the Yes button to allow overwriting the system file, followed by the exit command to reboot the machine and enter Win as normal. The repair process is complete


From microsoft:
To complete part one, follow these steps:
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.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
If you have a dual-boot or multiple-boot computer, select the installation that you want to access from the Recovery Console.
When you are prompted to do so, type the Administrator password. If the administrator password is blank, just press ENTER.
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.