Pinterest Stumbleupon Whatsapp
Ads by Google

MBR, if you are unfamiliar, is the first sector of your hard disk. It is just 512 bytes in size, but boy are those 512 bytes important or what? The MBR is used for bootstrapping operating systems, holding the primary partition table of your disk and other important information. You take this information away and chances are you will not be able to boot the operating system.

While installing the operating system, the installer takes care of writing appropriately to the first 512 bytes to allow the operating system to boot and detect partitions. Once that has been done, you do not have direct access to the MBR (which is generally not recommended). However, there are times when you need to take things in your own hand (like backing up MBR before restoring a hard disk image or an OS install, making a partition bootable, or recovering from a corrupt MBR etc), for such times there is a small utility you can use, called – MBRWizard.

MBRWizard allows you to save/restore MBR, fix a corrupt MBR, you can hide/unhide hard disk partitions, make a partition bootable or delete it all together, make a flash disk bootable etc.

fix mbr

MBRWizard is a command line utility you can download from here. Fire up Command Prompt and browse to where you have MBRWiz.exe stored (or else add the directory to your PATH variable), type MBRWiz and you will see a list of all the options. You can then decide which option to choose according to what you are trying to accomplish.

Here are a few examples.

Ads by Google

To create a backup of MBR

MBRWiz /save=C:\savedMBR

You can then use this backup copy to restore MBR in case you ever have to.

To restore MBR from the saved file

MBRWiz /Restore=C:\savedMBR

repair mbr

To see an exhaustive list of all the partitions along with attributes

MBRWiz /List

To Hide a parition use

MBRWiz /Hide=Yes /Disk=0 /Part=2

To delete a partition

MBRWiz /Part=2 Del

You can find the complete documentation of all the options and how to use them, here. The site also lists how you can troubleshoot MBR problems when you cannot boot into the operating system. Although in such situations, you must have a way to boot from a CD, USB drive or (ahem..) floppy disk and be able to run MBRWizard. Check out how to make your own Windows Live CD How To Make Your Own Windows Live CD How To Make Your Own Windows Live CD Read More , MBRWizard would be a nice utility to have on your live CD.

MBRWizard is a great tool to have everything is working fine, as well as when you need to fix MBR issues. You must have your favorite tools to jumpstart a problematic computer. We would love to hear about them so tell us in the comments.

  1. Desktopuser
    January 28, 2015 at 6:58 am

    downloaded the MBRWiz - Version 3.0.83 for Windows, which was a freeware.
    I tried using the above command : MBRWiz /Restore=C:savedMBR

    But i get an error saying:

    Error 105: Invalid or incomplete switch: /Restore=C:savedMBR
    Note: Command line parameters may have changed in version 3.0
    Please check the latest documentation to verify the specified parameters

    What do i do, i am searching everywhere for a solution. The command line looks similar to v2.0 but doesn't work for v3.0.
    Any suggestion.

  2. Desktopuser
    January 28, 2015 at 6:41 am

    I downloaded the MBRWiz - Version 3.0.83 for Windows, which was a freeware.
    I tried using the above command : MBRWiz /Restore=C:savedMBR

    But i get an error saying:

    Error 105: Invalid or incomplete switch: /Restore=C:savedMBR

    Note: Command line parameters may have changed in version 3.0
    Please check the latest documentation to verify the specified parameters

    What do i do, i am searching everywhere for a solution.

  3. Bob Sprowl
    October 28, 2009 at 4:18 pm

    I've got bad MBR. The system stops with a Windows boot error of 0x000007B which means corrupted MBR.

    I took the hard disk out and connected it as a external (USB) drive on another computer. What I can't seem to find is a program that will repair/restore its MBR.

    Will this solve my problem?

  4. Jimm
    August 26, 2009 at 9:37 am

    Fantastic find... You just saved my butt! Thanks for taking the time to document this awesome little app!

  5. Aibek
    July 16, 2009 at 11:31 pm

    I wish I knew about this app about 4 years ago when one of my harddrives failed to bootdue to corrupt MBR. I had to reinstall my OS on another hard drive and then recover files manually.

  6. Dan
    July 13, 2009 at 10:54 pm

    I use Ultimate Recovery disk, I formatted my Ubuntu partition once overwriting grub and URD saved my butt. Not sure exactly what it was I used though.

  7. Into Windows
    July 13, 2009 at 1:57 pm

    Thanks for the guide, Varun. I knew only about FixMbr command.

Leave a Reply

Your email address will not be published. Required fields are marked *