Harshvardhan

One Day When I  started  my computer  Windows XP, I get the “MBR Corrupt” and “Error loading operating system” messages. Its shows my hard disk MBR Corrupted.

What is MBR  ?

MBR (Master Boot Record) - When we start computer, the BIOS (basic input/output system) looks for the MBR on the first sector of your hard disk. MBR tells the BIOS on which hard disk partition contains the operating system. MBR has  only 512-byte size.

If the MBR is damaged or corrupted our hard disk, the BIOS unable locate and start the operating system. When your BIOS find a damaged MBR or boot sector, it display error messages like  ”Invalid partition table”, “Error loading operating system”, or “Missing operating system”.

How to Repair  Damaged MBR

1. First Boot your computer with the Windows XP Setup disk in the CDROM drive. ( Befor restart system first set  boot sequence CDROM from BIOS’s  Boot Sequence  setting). 

2. If you get message press a key to start the computer from CDROM, press a key . Otherwise it may try to boot system from the hard disk.   

3. After few minutes, getting message  to press the R key to start the Recovery Console.   

4. When Recovery Console starts, it will prompt you to enter  number corresponding to the Windows XP installation that you need to repair.                                                                                                      In most cases, you’ll enter “1″ (which will be the only choice). If you press ENTER without typing a number, Recovery Console will quit and restart your computer.

 
5. Enter your Administrator password. If you don’t enter the correct password, you cannot continue.

6. At the Recovery Console command prompt, type command fixmbr  then verify that you want to proceed.

Note : If you have System which has win98 O/S installed and your hard disk MBR damaged then you need win98 bootable CD.     

First Boot System with Win98 Bootable CD.

type command  fdisk/mbr       

It will restore your harddisk MBR

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