How To Repair Windows XP With Windows XP CD

Disable antivirus program and BIOS-level antivirus protection (can refer the system manual to disable in BIOS) and change the boot device to CD/DVD. 

Insert the Windows XP CD in the drive and restart the system. 

"Press any key to boot from CD" appears, press a key. The computer starts booting from the Windows XP CD. 

You will come to a screen that displays "To set up Windows XP now, press ENTER" "To repair a Windows XP installation using Recovery Console, press R" "To quit Setup without installing Windows XP, press F3"
Press ENTER.

Accept the Licensing Agreement by pressing F8 key. 

Now it will display a screen "To repair the selected Windows XP installation, press R" "To continue installing a fresh copy of Windows XP without repairing, press ESC"

Press R.