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How to repair Windows XP Master Boot Record (MBR)

How to repair Windows XP Master Boot Record (MBR)

From time to time you will need a message on your computer when boot that states that your Operating System was not detected or that your primary hard drive was not found. When these messages come up alot of people think that there hard drive had fail. However alot of times it is just because the Master Boot Record on the hard drive got corrpted so the data on the drive can not be read properly. This also is the cause of the flash cursor that people will see from time to time.

Note in these cases you will always want to run a hard drive test before the reinstall of Windows as a drive failure could have caused the problem but run through the below step will alot of times show that the drive is fine.
The steps below will take you repairing the MBR on your har drive. Note to go through this process you will need your Windows XP OS CD.

1. The first thing you will need to do is boot your computer off your Windows XP OS CD. To do this you will need to go into your BIOS and change the boot order to have your ROM drive set as the first boot device. Note some OEM computers have a boot menu set to a hot key like F12. This option sould let you boot from the ROM drive without having to go into the BIOS.

2. After you have selected to boot you computer from the ROM drive with the Windows XP OS CD in the drive you will seee a message that states "press any key". You will need to press any key on your keyboard to have the computer boot off the Window XP OS CD.

3. After the setup loads you will want to select "R" to run the Windows XP Recovery Console


4. After the Windows Recovery Console loads you willl need to type the number that refers to the drive that you are wanting to repair. Note in most cases you will type "1" then press enter. Then you need to enter the Administrator password for the system. If you do not know it or does not work then at this point you will need to look at backing up for files with another computer and doing a full reinstall of Windows on the hard drive.


5. After you are able to enter the Administrator password you will be at a prompt here is where you will type "fixmbr". This will repair the damaged MBR. Inaddition will may want to run "fix boot" this will fix any issues with the boot sector.

Note if you still have trouble getting the system to boot properly after running through these steps you will want to do a backup of your files and do a full reinstall of Windows. Also run any hard drive tests to make sure there is not anything wrong with the hard drive.

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after reading the BIOS software, my Gateway CX200X gives the message: MBR error. what is this?


MBR stands for Master Boot Record. It is an essential piece of information written on the Hard Drive that allows the program to load. If the MBR is corrupted the computer boot process cannot proceed.
You have to repair it.
On old systems with a floppy drive you would get a Win98 boot disk on a floppy, boot the system using the A:drive (floppy) then use a DOS command to refresh the Master Boot Record.
If your system is using Windows XP tablet PC edition you might be able to use the installation disk to boot to the recovery console and use the command FIXBOOT or FIXMBR. You can also reinstall the Operating System.
I hope this answer gave you some starting point to investigate further. There are on the web some software vendors who sell system recuperation CDs. Some may be free other you have to buy.

Jun 10, 2012 | Gateway CX200X Tablet PC

1 Answer

MRB Error message on Gateway laptop 6510GZ. how can we resolve?


First of all I'm not this smart. I found it and pasted it here for you from:
http://www.pcpowerguide.com/windows/damaged-mbr-error-message/

They get all the credit!

MBR is the acronym for Master Boot Record. The master boot record is located in the boot section of your hard drive, which is the first sector on the first platter. When you boot your computer, the master boot record tells the computer's BIOS (Basic Input Output System) where to find the bootstrap code for the operating system.
So if the MBR is corrupted, the BIOS can't find the operating system and you can get error messages like the following ones:
  • Missing operating system
  • Error loading system
  • Invalid partition table
Looks pretty scary, doesn't it?
However, it is usually not that hard to fix a corrupted MBR and usually the rest f the hard drive is just fine and will boot normally once your fix the master boot record.
What Causes Damage to the MBR? A lot of things can cause damage to the MBR such as viruses designed to corrupt the boot sector. Some of them copy the original MBR to another file. Others do this by overwriting the MBR with virus code. In fact viruses and malware are one of the most frequent causes but, any file can become corrupted especially files that are accessed as frequently as the MBR.
How to Fix the MBR The stapes to fix the MBR are slightly different in the different versions of Windows. So I will cover them separately.
Windows XP
  1. Insert your XP installation disk in the CD-Rom and reboot the computer
  2. When asked, press any key to boot from the CD
  3. When you get the Welcome to Setup screen, press "R" to open the repair console
  4. Enter your administrator password when prompted
  5. At the command prompt, type fixmbr and press enter
  6. When a new command prompt appears, type exit
  7. Remove your installation CD
  8. Restart the computer
Windows Vista
  1. Insert your Vista installation disk in the CD-ROM and reboot the computer
  2. When asked, press any key to boot from the CD
  3. When you get the Install Windows screen, fill in the language and location options and then click Next
  4. Click on the Repair your computer option
  5. Select the Windows Vista operating system and click Next
  6. Enter your administrator password when prompted
  7. In the System Recovery Options, select Command Prompt
  8. When a command prompt appears, type bootrec.exe and press enter to fix the MBR
  9. When a new command prompt appears, type exit
  10. Remove your installation CD
  11. Click Restart in the System Recovery Options window
Windows 7
  1. Insert your Windows 7 installation disk in the CD-ROM and reboot the computer
  2. When asked, press any key to boot from the CD
  3. When you get the Install Windows screen, fill in the language, Time and Keyboard Input options and then click Next
  4. Click on the Repair your computer option
  5. In the System Recovery Options, select Command Prompt
  6. When a command prompt appears, change to the boot directory
  7. Now type bootsect /nt60 SYS and press enter to fix the MBR
  8. When a new command prompt appears, type exit
  9. Remove your installation CD
  10. Reboot the computer

Aug 14, 2011 | Gateway 6510GZ Notebook

2 Answers

while recovering my laptop 2910tx from recovery cd i got an error 0x4001100200001005. what should i do? install another version os, or other way?/


Since you didn't give much info I'll do my best. Did the error tell you that it couldn't find an operating system? Driver?
Reboot and enter "set up" change the boot order in the BIOS so that your cd/dvd is the first boot device. If you computer isn't destroyed you should get the recovery console then. Try getting into safe mode if possible and doing a system restore, or last known good configuration if you can't restore. If you can boot try those first if not then use the console and try to fix mbr.
MBR stands for Master Boot Record and it's the first sector of your hard drive that basically tells the BIOS where to look for the operating system on your computer.
If, for any reason, the MBR becomes damaged or corrupt, then the operating system will be unable to load. You will normally see error messages like:
Error loading operating system
Missing operating system
Invalid partition table
These messages are definitely not fun, especially if you are not familiar with computers. Most people would automatically assume their computers are dead! However, that's not true. Being in IT myself, these errors are actually preferably to other types of Windows errors. Why?
Well, it's actually fairly easy to fix the Master Boot Record in XP and Vista. All you have to do is load up the Recovery Console and run a simple command. All of your data, applications, settings, etc are still intact on the drive and once the MBR is fixed, the computer will load normally.
So how can you repair your damaged MBR? Here are the steps to follow:

1. First, restart your computer with the Windows XP setup disk in the CD drive.
2. When prompted, boot from the CD drive by pressing any key. If Windows loads automatically, you will first have to enter the BIOS setup and change the order of the boot devices to start with the CD drive.
3. Once the setup loads, you will see the option to press R to repair a Windows installation.
4. Once the Recovery Console loads up, you will have to type in a number that corresponds to your Windows installation. This is normally just 1. Press Enter and then type in the Administrator password.
5. Now at the prompt, type in fixmbr. Your damaged MBR will now be replaced with a new master boot record and your computer should now be able to boot properly. Note that you may also want to run the fixboot command to repair the boot sector with a new one.
Also, make sure you only use these commands on a system with one operating system installed. If you have more than one operating system installed, fixmbr and fixboot could mess up everything.
Fix MBR in Vista
In Vista (I'm assuming you have Vista) the procedure to fix the master boot record is a bit different. You have to start up Vista in the Recovery Environment and then run the bootrec command. Here's how.

1. First, load up the Windows Vista disc in your drive and press any key to boot from the disc.
2. Choose the language, time, currency, etc and click Next. Now click on Repair Your Computer.
3. Choose the operating system to repair and click Next. When the System Recovery Options dialog comes up, choose the Command Prompt.
4. Now type bootrec.exe and press Enter. This will rebuild the boot configuration data and hopefully fix your problem. You can also run the command with switches to fix just the master boot record (/fixmbr), the boot sector (/fixboot), or rebuild the entire BCD (/rebuildbcd).

Hope this helps.
If this helps you resolve your problem, please
consider giving me a good rating and a quick
"thanks" or "good job".It will help me as well.
Thank you.

Oct 28, 2010 | Computers & Internet

2 Answers

we got the problem in our internal segate harddisk. when the system is on, shows the error message of Boot disk failure.


This sounds like a problem with the hard drive's MBR (Master Boot Record) If you have a windows xp disk, insert it and boot from it, make sure that your cd-rom device is set as the first in the list on your boot priority in your bios. Here are the steps for xp and vista

So how can you repair your damaged MBR? Here are the steps to follow:
1. First, restart your computer with the Windows XP setup disk in the CD drive. If you don’t have your original disk, borrow one or download a ISO image from a torrent site.
2. When prompted, boot from the CD drive by pressing any key. If Windows loads automatically, you will first have to enter the BIOS setup and change the order of the boot devices to start with the CD drive.
changebootorder-thumb.png
3. Once the setup loads, you will see the option to press R to repair a Windows installation.
repairwindows-thumb.png
4. Once the Recovery Console loads up, you will have to type in a number that corresponds to your Windows installation. This is normally just 1. Press Enter and then type in the Administrator password.
recoveryconsole-thumb.png
5. Now at the prompt, type in fixmbr. Your damaged MBR will now be replaced with a new master boot record and your computer should now be able to boot properly. Note that you may also want to run the fixboot command to repair the boot sector with a new one.
Also, make sure you only use these commands on a system with one operating system installed. If you have more than one operating system installed, fixmbr and fixboot could mess up everything.
Fix MBR in Vista In Vista, the procedure to fix the master boot record is a bit different. You have to start up Vista in the Recovery Environment and then run the bootrec command. Here’s how.
1. First, load up the Windows Vista disc in your drive and press any key to boot from the disc.
2. Choose the language, time, currency, etc and click Next. Now click on Repair Your Computer.
repaircomputervista-thumb.png
3. Choose the operating system to repair and click Next. When the System Recovery Options dialog comes up, choose the Command Prompt.
systemrecoveryoptions-thumb.png
4. Now type bootrec.exe and press Enter. This will rebuild the boot configuration data and hopefully fix your problem. You can also run the command with switches to fix just the master boot record (/fixmbr), the boot sector (/fixboot), or rebuild the entire BCD (/rebuildbcd).
If you are still having trouble with loading Windows, post a comment and I’ll see if I can help! Enjoy

May 25, 2010 | Seagate Barracuda 7200.10 500 GB SATA Hard...

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