Windows 8 and 8.1 Forums


Accidentally Deleted System Reserve partition

  1. #1


    Posts : 10
    Windows 8.1

    Accidentally Deleted System Reserve partition


    So a few weeks ago I was screwing around with partitioning my HDD trying to get around some bad sectors that I had picked up in a chkdsk. In the process I accidentally deleted the System Reserve partition, so naturally now my windows wont boot. I've tried downloading a recovery disk but this didnt help, I tried using a bootable version of partition wizard to fix the problem to no avail. I'm currently running a bootable version of ubuntu so that I can do general browsing and access the HDD, but I really need my windows back up and running I havent been able to get any work done in these past two weeks as this Laptop is my only available. Others have suggested doing a format and clean install but this is almost impossible for me as I have too much things on my legit windows installation I cant do without. Please help me if possible any advice would be highly appreciated.

      My System SpecsSystem Spec

  2. #2



    BSOD Kernel Dump Analyst
    Posts : 2,273
    Windows 10 Pro


    You have to re-install Windows to restore the boot partition properly.
    There are some other solutions, but none of them could give a 100% result.

    Back-up all of your important stuff.
      My System SpecsSystem Spec

  3. #3


    Posts : 879
    Windows 10


    Computer is unable to boot into Windows 8

    Note that these instructions only work if the hard disk has an MBR (Master Boot Record) partition table. Here is some info about MBR and GPT partition style: link

    - Boot the computer using the Windows 7/8/8.1 installation media.
    - On the first screen, press SHIFT+F10 to bring up command prompt.
    - Run the following commands at the command prompt.

    bootrec /fixmbr
    bootrec /fixboot
    bootrec /rebuildbcd

    The bootrec /rebuildbcd command will search for Windows installations not included in the Boot Configuration Data (BCD) and then ask you if you'd like to add one or more to it.

    ******************************

    Note: If you receive the error message "Element not found" when you execute the "bootrec /fixboot" or bootrec /rebuildbcd command, then you must first mark boot partition as active with diskpart. Note: If there is a partition labeled "System Reserved", it is the boot partition, if not, the Windows OS partition is the boot partition.

    diskpart
    select disk 0
    list partition
    select partition # Note: Select the "System Reserved" partition (if you have it) or the Windows OS partition.
    active
    exit

    ******************************


    Note: If Windows does not start and you receive the error message "BOOTMGR is missing", then copy the bootmgr file from the Windows installation media to your Windows OS partition root directory.

    diskpart
    list volume Note: Note the volume letters.
    exit

    (these instructions assume your DVD drive is D: and your Windows OS is installed in C: drive)

    copy D:\bootmgr C:\

    ******************************
    Step One:

    bootrec /fixmbr

    Step Two:

    diskpart
    select disk 0
    list partition
    select partition # Note: Select the "System Reserved" partition (if you have it) or the Windows OS partition.
    active
    exit

    Click image for larger version

    Step Three:

    bootrec /fixboot

    Step Four:

    bootrec /rebuildbcd

    Click image for larger version

    Click image for larger version
    Last edited by genet; 01 Apr 2015 at 11:02. Reason: added pictures
      My System SpecsSystem Spec

  4. #4


    Posts : 2,690
    Windows 3.1 > Windows 10


    Download my bootable tools iso - link in sig below to get a "Windows" Recovery Environment

    "W" in this command example is your Windows OS Drive letter - change to match your Actual Windows OS drive letter..

    From the command prompt type>

    W:\Windows\System32\bcdboot W:\Windows
      My System SpecsSystem Spec

  5. #5


    Welcome Ghed !

    Good answers genet and KYHI !



    +1
      My System SpecsSystem Spec

  6. #6


    Posts : 2,690
    Windows 3.1 > Windows 10


    There is a small difference in the method - My method will repair the boot files on both MBR and EFI disks
    Not just MBR Boot disks
      My System SpecsSystem Spec

  7. #7


    Posts : 10
    Windows 8.1


    Quote Originally Posted by KYHI View Post
    Download my bootable tools iso - link in sig below to get a "Windows" Recovery Environment

    "W" in this command example is your Windows OS Drive letter - change to match your Actual Windows OS drive letter..

    From the command prompt type>


    W:\Windows\System32\bcdboot W:\Windows
    Ok thanks, i'll try it now I'll be back with the results
      My System SpecsSystem Spec

  8. #8


    Posts : 879
    Windows 10


    Quote Originally Posted by KYHI View Post
    "W" in this command example is your Windows OS Drive letter - change to match your Actual Windows OS drive letter..

    From the command prompt type>

    W:\Windows\System32\bcdboot W:\Windows
    That will not work in this case (see screenshots below).

    Click image for larger version

    Click image for larger version

    edit:

    But for example in this case it works.

    Cannot boot my second OS after re-install of primary OS
      My System SpecsSystem Spec

  9. #9


    Posts : 2,690
    Windows 3.1 > Windows 10


    genet, try this in your VM test subject

    W:\Windows\System32\bcdboot W:\Windows /s W:

    the > /s W:

    tells it to install the boot files on that MBR partition
      My System SpecsSystem Spec

  10. #10


    Posts : 10
    Windows 8.1


    Quote Originally Posted by KYHI View Post
    Download my bootable tools iso - link in sig below to get a "Windows" Recovery Environment

    "W" in this command example is your Windows OS Drive letter - change to match your Actual Windows OS drive letter..

    From the command prompt type>

    W:\Windows\System32\bcdboot W:\Windows
    x:\windows\system32>d:\windows\system32\bcdboot d:\windows
    Failure when attempting to copy boot files.
    x:\windows\system32>
    I got this when I attempted to use the command line
    .

    genet if this doesnt work out i'll try your method, I'm getting a windows 8.1 cd on loan later today
      My System SpecsSystem Spec

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Accidentally Deleted System Reserve partition
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