What happened NTLDR is Missing ?


When your computer starts, the BIOS attempts to find the primary hard drive's active partition to read the first sector for the MBR (Master Boot Record), it uses that info to load the rest of the OS.


For Windows NT4/2k/XP the NTLDR (New Technology Loader) takes it from there. If you get the "NTLDR is missing, press any key to restart" what's most likely going on is the BIOS either didn't look for the right drive, didn't find the right partition, it wasn't active, didn't find the MBR, or the MBR didn't list NTLDR in the right place, or the location of NTLDR changed.

# Computer is booting from a non-bootable source.
# Computer hard disk drive is not properly setup in BIOS.
# Corrupt NTLDR and/or NTDETECT.COM file.
# Misconfiguration with the boot.ini file.

If possible, try to change back whatever hardware or software change you just made (this could be as simple as leaving a floppy disk in the drive or you need to recheck the cables).