Recovering from "NTLDR is missing" using the Windows Ultimate BootCD Main Index        Tips and Tweaks Run the Windows UBCD Check that the file NTLDR is on the hdd, it will be located on C:\ntldr. If the file is not there replace it with a copy from your original installation disk. Go -> Programs -> System Tools -> Check Disk Type C if this is your partition containing the operating system, adjust according if these files are on a different partition ie D, E etc.... Do you want to fix errors .....: Enter Y Start check disk? Enter Y Then defrag the Hard Drive with Dirms. Go -> Command prompt Then type the following dirms C -q This will defrag the hard drive, once completed reboot. Your system should now boot. If this still doesn't work you will need to do a repair installation of XP.