Error msg......NTLDR is missing, press

You need to repair the Operating System.
Insert the Windows XP Setup Disk to the CD/DVD Drive and restart, if you are prompt to press any key to boot from Cd, press any key. wait until you see a message that you should press r key to repair, press enter key to continue, then it will now try to detect your current OS information, then it will now tell you the type of OS you have on your PC. it will show you options to either setup new OS or Repair the current one. Then press they Option key given to repair the current one. follow the instructions that follows. after the repairs, your PC will boot normally.

Thanks