Some of the system files becomes corrupt when we install certain application.U know that once system files become corrupt than it becomes really frustrating to repair your XP installation.Here is a quick & safe solution.This method will only work only if u r running the machine i.e u have already logged into the system.If u some how get into safe mode also than this can be used.Place the Windows XP cd in your cd/dvd drive
Go to start
type in 'sfc /scannow' (without the ')
Now it should all load, and fix all your corrupted file on windows XP
There are a number of parameters that can be passed to sfc command.Go to cmd & type 'sfc' without single quotes & u get something similar as shown above....