How to resolve missing NTLDR ?

Sometimes when you switch your PC, a black screen (shown below) appears saying "NTLDR is missing". This problems arises in older version of Windows like Window 98, Window XP In this post, I will help you solve this issue. 

What is NTLDR?
NTLDR is short for NT loader– a program loaded from the hard drive boot sector that displays the Microsoft Windows NT startup menu and helps Microsoft Windows NT load. So when it goes missing for some reason, your windows cannot load. I use Windows XP on a Pentium 4 PC. Though it seemed common on a routine google search, it was not so easy to fix and many forums reported that formatting hard drive was the last solution eventually.

SYMPTOMS
When you try to install Microsoft Windows XP or upgrade to Windows XP on a computer that runs Microsoft Windows 95, Windows 98, or Windows Millennium Edition, you may receive the following error message after the first restart during the installation:
NTLDR is missing
Press any key to restart

CAUSE
This problem may occur if your existing Windows 95, Windows 98, or Windows Millennium Edition installation was cloned and then applied to a drive that has a different geometry from that of the source drive of the cloned copy.

RESOLUTION
To resolve this problem, correct the Heads (sides) value in the FAT32 BPB so the Windows XP startup can continue. To update the value, rewrite the Windows 95, Windows 98, or Windows Millennium Edition startup code.

How to resolve the missing NTLDR on your Computer?
Step 1: Insert the bootable CD/DVD of Windows XP into the computer.
Remember, in boot device priority, the 1st Boot Device should be CD/DVD Rom. If it isn't then, you can change it through BIOS.
When prompted to "Press any key to boot from the CD" , press any key.
After that, it will automatically loads files. After files loading, wait until the following screen appears.

Step 2: Then press "R" to repair Windows.

Step 3: Now to repair the Windows XP, we have to copy certain files. Type the following commands to copy those files from the CD/DVD  to C: drive ( Remember no matter wherever your XP is installed in C:, or D: or E:  drives, the file should always be copied in C:)

C:\ copy <Space> CD/DVD drive letter :\i386\ntldr <space> C:\
C:\ copy <Space> CD/DVD drive letter :\i386\ntdetect.com <space> C:\

For example, if your drive letter of CD/DVD Rom is "F". then,

C:\ copy <Space> F:\i386\ntldr <space> C:\
C:\ copy <Space> F :\i386\ntdetect.com <space> C:\

Once both of these files have been successfully installed, your computer will work like previous.

If you encounter any problem, please post in the comment. I will help you solve the issue.