How do you solve ntldr missing in windows server 2003 and can you rename a domain if so what is the procedure in windows server 2008
This Microsoft support article describes troubleshooting
You could potentially use a non-Windows boot disc to restore
Most of the time when I get an 'ntldr machine', the system partition just needs a chkdsk.
Sometimes it does need a repair/reinstall after an infection.
Even rarer is a partition table or BIOS boot order change which leaves the boot order changed and boot.ini broken.
And once, an Adaptec RAID controller popped the hot spare as first hard disk in the boot order, because of a bug in combination with me putting the hot spare in as drive 0. Good luck :-)