NTLDR is Missing.

Issue:NTLDR is Missing.
Related errors:
Below are the full error messages that may be seen when the computer is booting.
NTLDR is Missing
Press any key to restart
Boot: Couldn’t find NTLDR
Please insert another disk
NTLDR is missing
Press Ctrl Alt Del to Restart

 1.Computer is booting from a non-bootable source.
2.Computer hard disk drive is not properly setup in BIOS.
3.Corrupt NTLDR and/or NTDETECT.COM file.
4.Misconfiguration with the boot.ini file.
5.Attempting to upgrade from a Windows 95, 98, or ME computer that is using FAT32.
6.New hard disk drive being added.
7.Corrupt boot sector / master boot record.
8.Seriously corrupted version of Windows 2000 or Windows XP.
9.Loose or Faulty IDE/EIDE hard disk drive cable.
10.Failing to enable USB keyboard support in the BIOS.