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DELETED BOOT MGR

    Question

  • HELP! i deleted bootmgr which  means i cannot boot absolutely anything ... not even a vista disk :(  i really need your help ! 
    Monday, December 14, 2009 4:26 AM

Answers

  • When start the computer please press F8 to access the "Advanced Options" boot menu as is the case in most recent Windows operating systems. In Windows 7 the Win RE environment will be present there. Please choose Repair Your Computer. Then you will enter Win RE and run Startup Repair.

    However if the entry is not present, you need an installation image, such as installation DVD or USB flash drive to boot into Win RE.


    Arthur Xie - MSFT
    Tuesday, December 15, 2009 7:33 AM

All replies

  • I sure hope you did a backup complete with the system image. Did you? If so, put in the Windows 7 DVD and go into system bios to set the DVD as the 1st boot device, then once thats done, boot off the DVD, click install, repair and it'll give you directions to either automatically select your backup or you can do it manually. If this isn't the case, let us know.
    MCSE, MCSA, MCDST
    Monday, December 14, 2009 4:46 AM
  • yeah i backed it up but it wont let me boot from the disc
    Monday, December 14, 2009 5:03 AM
  • And here's more (which I also put in your other post about Compressed) http://social.technet.microsoft.com/Forums/en/w7itprogeneral/thread/18050719-925c-411d-8468-86add6076ea2

    Try this if you don't have a backup of your system with a system image. It refers to Vista but it will work just the same.
    If you do not have a Vista disk you can borrow a friend's as they are not copy protected. The
    system maker will sell the physical disks to you cheap as you already own windows. Also you
    can make repair disks on another computer, see below.

    Try Startup Repair -

    This tells you how to access the System Recovery Options and/or use a Vista Disk
    http://windowshelp.microsoft.com/Windows/en-US/Help/326b756b-1601-435e-99d0-1585439470351033.mspx

    Try StartUp Repair from Recovery Options or Vista disk.

    How to do a Startup Repair
    http://www.vistax64.com/tutorials/91467-startup-repair.html

    Unable to boot in windows vista- windows boot configuration data file is missing required information -
    Repair Corrupt Boot Manager
    http://www.troublefixers.com/unable-to-boot-in-windows-vista-windows-boot-configuration-data-file-is-missing-required-information/

    How to use the Bootrec.exe tool in the Windows Recovery Environment to troubleshoot and repair
    startup issues in Windows Vista
    http://support.microsoft.com/kb/927392

    How to fix "BOOTMGR is missing" in Windows Vista
    http://cyberst0rm.blogspot.com/2007/04/how-to-fix-bootmgr-is-missing-in.html

    Error message when you start Windows Vista: "The Windows Boot Configuration Data file is missing
    required information"
    http://support.microsoft.com/kb/927391

    Vista Tip: Repair "BOOTMGR is missing" error - a quick how to
    http://lifehacker.com/251733/vista-tip--repair-bootmgr-is-missing-error

    See this section here - To repair/rebuild the Boot Config Data Use the Bootrec.exe Tool
    http://www.vistax64.com/tutorials/163304-dual-boot-using-free-partitioning-software.html

    When you get your VISTA OS dvd, or borrow someone's you can perform the steps below to fix your Master Boot Record (MBR) and boot your windows and get your widows working again. See below:



    To run the Bootrec.exe tool, you must start Windows RE. To do this, follow these steps:
    1. Put the Windows Vista or Windows 7 installation disc in the disc drive, and then start the computer.
    2. Press a key when you are prompted.
    3. Select a language, a time, a currency, a keyboard or an input method, and then click Next.
    4. Click Repair your computer.
    5. Click the operating system that you want to repair, and then click Next.
    6. In the System Recovery Options dialog box, click Command Prompt.
    7. Type Bootrec.exe, and then press ENTER.
    Note To start the computer from the Windows Vista or Windows 7 DVD, the computer must be configured to start from the DVD drive. For more information about how to configure the computer to start from the DVD drive, see the documentation that is included with the computer or contact the computer manufacturer.

    Bootrec.exe options

    The Bootrec.exe tool supports the following options. Use the option that is appropriate for your situation.

    Note If rebuilding the BCD does not resolve the startup issue, you can export and delete the BCD, and then run this option again. By doing this, you make sure that the BCD is completely rebuilt. To do this, type the following commands at the Windows RE command prompt:
    • bcdedit /export C:\BCD_Backup
    • c:
    • cd boot
    • attrib bcd -s -h -r
    • ren c:\boot\bcd bcd.old
    • bootrec /RebuildBcd

    /FixMbr

    The /FixMbr option writes a Windows 7 or Windows Vista-compatible MBR to the system partition. This option does not overwrite the existing partition table. Use this option when you must resolve MBR corruption issues, or when you have to remove non-standard code from the MBR.

    /FixBoot

    The /FixBoot option writes a new boot sector to the system partition by using a boot sector that is compatible with Windows Vista or Windows 7. Use this option if one of the following conditions is true:
    • The boot sector has been replaced with a non-standard Windows Vista or Windows 7 boot sector.
    • The boot sector is damaged.
    • An earlier Windows operating system has been installed after Windows Vista or Windows 7 was installed. In this scenario, the computer starts by using Windows NT Loader (NTLDR) instead of Windows Boot Manager (Bootmgr.exe).

    /ScanOs

    The /ScanOs option scans all disks for installations that are compatible with Windows Vista or Windows 7. Additionally, this option displays the entries that are currently not in the BCD store. Use this option when there are Windows Vista or Windows 7 installations that the Boot Manager menu does not list.

    /RebuildBcd

    The /RebuildBcd option scans all disks for installations that are compatible with Windows Vista or Windows 7. Additionally, this option lets you select the installations that you want to add to the BCD store. Use this option when you must completely rebuild the BCD.

    MCSE, MCSA, MCDST
    Monday, December 14, 2009 5:05 AM
  • that is very helpful info but it only works if it would boot from a disc it won't :(
    Monday, December 14, 2009 5:10 AM
  • and did you read my first reply about making the DVDrom the 1st device in the boot order?  Have you tried that disc in another another to make sure the disc is bootable and readable?
    MCSE, MCSA, MCDST
    Monday, December 14, 2009 6:01 AM
  • When start the computer please press F8 to access the "Advanced Options" boot menu as is the case in most recent Windows operating systems. In Windows 7 the Win RE environment will be present there. Please choose Repair Your Computer. Then you will enter Win RE and run Startup Repair.

    However if the entry is not present, you need an installation image, such as installation DVD or USB flash drive to boot into Win RE.


    Arthur Xie - MSFT
    Tuesday, December 15, 2009 7:33 AM
  • when i pressed F8 it still said BOOTMGR is compressed hit ctr-alt-del to  restart
    Tuesday, January 12, 2010 11:56 PM
  • i've tried EVERYthing and the boot manager still doesnt work
    Wednesday, January 13, 2010 12:45 AM
  • If your Windows Vista computer has encountered the dreaded “BOOTMGR is missing” error, you aren’t alone. If the problem isn’t hardware related you can fix it with relative ease as long as you have a Windows Vista DVD handy.

    If you don’t have one, you can create a Windows Vista repair disk.

    image

    Boot off the Windows Vista DVD and then click Next at the first prompt:

    image

    You should see a link in the lower left-hand side for “Repair your computer”

    image

    The installation process will attempt to find your Vista installation directory. If there’s more than one in the list, select the correct one and then use the Next button again.

    image

    Click the first link for “Startup Repair”

    image

    The installation process will repair the system, and then prompt for you to reboot.

    image

    Alternatively you could have chosen the Command Prompt option instead, and use the following command to fix the boot options only:

    bootrec /fixboot

    image

    At this point you should be able to reboot your computer, remove the DVD and everything should be working

    Second option

       

    Install EasyBCD

    Run it program within Windows 7. With this program you can edit your bootloader with a GUI (which I prefer over a command line).

    You can add and delete installations, so delete your Hyper-V entry and after that you can savely delete the partition. Problem solved!

    alt text


    regards

    Balaji

    Wednesday, January 13, 2010 5:27 AM
  • None of the above work when the root cause is compressed boot files.  However this works every time: Linux folks got it right
    Thursday, July 19, 2012 8:04 PM