If you haven't found any solution yet to fix the error about NTLDR is missing.
NTLDR is the abbreviation of NT loader which is typically run in hard disk drive and portable storage device.
Based on this site: "http://support.microsoft.com" Kindly read the steps/instructions to resolve the NTDLR missing error in Windows XP
For further information, click HERE
Hope it can resolve the issue you've experienced
Have a great day! Godspeed!