If you have a Windows XP CD, then boot from it.
After the boot process you can “Press R” to go to the recovery console.
You would be asked to select the “Windows” by choosing the number shown in the list in recovery console.
After you choose the “Windows”, you would be asked to enter the administrator password.
If you have not set any password for the administrator account(not your account), just press “ENTER”.
In the recovery console type: