Booting Issues of windows XP - Config file Missing

Windows\system32\config\system File Is Missing Or Corrupt - When this error occurs at the time of booting  XP won't start, 

Solution:

Boot with the XP CD and go to the RecoveryConsole. 

Type:

cd system32\config [enter]
ren system system.old [enter]
ren system.alt systemalt.old [enter]
copy c:\windows\repair\system [enter]
copy c:\windows\repair\regback\system [enter]
exit

Thanks to
Rajesh H, System Administrator, Puttur(DK) HPO