ntldr missing.

 Have you seen the error message?
                           

                           

Before moving ahead we can see, what is ntldr. It is a small program short for NT loader. This program loaded from the hard drive boot sector that displays the Microsoft Windows NT startup menu and helps Microsoft Windows NT/2000/XP load. This portion of the boot sequence was replaced by Bootmgr in Windows Vista and later versions of Windows.

Why this type error?

1. Computer is booting from a non-bootable source.
2. Computer hard drive is not properly setup in CMOS.
3. Corrupt NTLDR and 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 drive being added.
7. Corrupt boot sector or master boot record.
8. Seriously corrupted version of Windows 2000 or Windows XP.
9. Loose or Faulty IDE/EIDE hard drive cable.
10. Failing to enable USB keyboard support in the BIOS.

How to solve it?

1. Insert the Windows XP bootable CD into the computer.
2. When prompted to press any key to boot from the CD, press any key.
3. Once in the Windows XP setup menu press the "R" key to repair Windows.
4. Log into your Windows installation by pressing the "1" key and pressing enter.
5. You will then be prompted for your administrator password, enter that password.
6. Copy the below two files to the root directory of the primary hard drive. In the below example we are copying these files from the CD-ROM drive letter, which in this case is "e." This letter may be different on your computer.
   
   copy e:\i386\ntldr c:\
   copy e:\i386\ntdetect.com c:\
7. Once both of these files have been successfully copied, remove the CD from the computer and reboot.