Windows 8 and 8.1 Forums


How to remove grub bootloader? please help!

  1. #1


    Moscow
    Posts : 8
    Windows 8

    How to remove grub bootloader? please help!


    Hello everyone!

    Though this issue has been discussed already here, I've been unable to solve this puzzle for the last two days.

    So, I have a new ACER Aspire 5600U all-in-one with Windows 8 pre-installed, Intel core i5 3230M, RAM 4 GB DDR3. For some reason I decided to return this PC to the supplier and get another one (this has nothing to do with the OS). Now have to fully restore the factory settings.

    My problem is: I tried Fedora 20 Linux on this PC. Grub therefore installed itself as the default bootloader. I restored the factory settings on the Windows drive, manually removed Fedora partitions and extended the Windows partition. Everything fine, except Grub which is still the bootloader and offering to boot Fedora every time. I investigated numerous forums and sites, and tried many ways to remove Grub:


    • using the command prompt in the Windows 8 recovery environment, typing 'bootrec /fixmbr', 'bootrec /fixboot', 'bootrec /scanos', 'bootrec /rebuildbcd' (completed successfully, but no effect on Grub)
    • using the command prompt in the Windows 8 recovery environment, typing 'bootsect /nt60 SYS /mbr' (actually, I didn't understand what it did)
    • manually removing fedora boot entries with the bcdedit facility in the command prompt, typing 'bcdedit /delete {UUID of fedora entry} (completed successfully, but no effect on Grub)
    • doing essentially the same with the EasyBCD utility (no effect on Grub)
    • boot-repair CD, Ultimate boot CD and Super Grub CD all did not work, because failed to boot, either from CD or live USB


    Grub still appears at every (re)start and offers to boot Fedora. My impression is that Grub sits "on top" Windows and all Windows utilities. If I succeed in removing Fedora entries, they seem to re-emerge at the next restart. I can't "kill" Fedora permanently. Perhaps it should be removed not by Windows but by Linux utilities? i.e. by a live Fedora DVD?

    Is there any hope to get rid of GRUB? I'll appreciate your ideas!

      My System SpecsSystem Spec

  2. #2


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    To clean install:
    1) Clean the HD Drive, using Step one in this tutorial:
    SSD / HDD : Optimize for Windows Reinstallation - Windows 7 Help Forums
    than
    2a) Clean install with the OEM manufacturer's Recovery Disk.

    2b) Clean Install - Windows 8

    2c) UEFI (Unified Extensible Firmware Interface) - Install Windows 8 with
      My System SpecsSystem Spec

  3. #3


    Moscow
    Posts : 8
    Windows 8


    Thank you theog! I've never done this, so I will carefully look through the instruction. Windows 8 requires a 16 GB USB for a recovery disk, they don't supply it with the new PC (at least in Russia). So I'll have to buy one tomorrow and will keep you updated on the outcome.
      My System SpecsSystem Spec

  4. #4


    Moscow
    Posts : 8
    Windows 8


    Excuse me theog, just a quick question. If I do a recovery USB disk now, will my ACER recovery facility produce a truly "clean" Windows installation? I am actually afraid it will write Grub again to the USB recovery disk. What do you think? Thanks in advance!
      My System SpecsSystem Spec

  5. #5


    Posts : 5,360
    7/8/ubuntu/Linux Deepin


    Wiping is a bit drastic.

    Have a look on the EFI system partition and see if \EFI\Microsoft\Boot\Bootmgfw.efi is there.

    Fedora may have renamed it and replaced it with shim.efi ( renamed to bootmgfw.efi).

    You should be able to change them manually, if so.
      My System SpecsSystem Spec

  6. #6


    Moscow
    Posts : 8
    Windows 8


    Hi SIW2 and thanks for your input! Yes, I agree that for me, wiping the disk is somewhat challenging.

    I am not exactly sure how can I look at the EFI system partition. This is a part of the output from '
    bcdedit /enum firmware' (sorry some text is in Russian):

    --------------------
    identifyer {bootmgr}
    description Windows Boot Manager
    locale en-US
    inherit {globalsettings}
    default {current}
    resumeobject {4672126e-7ad0-11e3-be71-806e6f6e6963}
    displayorder {current}
    {3c0d3aea-7ae3-11e3-8606-806e6f6e6963}
    {6b9d2bd8-7b3c-11e3-b72e-806e6f6e6963}
    toolsdisplayorder {memdiag}
    timeout 0
    displaybootmenu No

    Приложение микропрограммы (101fffff)
    -------------------------------
    identifyer {108dc9d8-7b82-11e3-91ad-806e6f6e6963}
    description Fedora

    Приложение микропрограммы (101fffff)
    -------------------------------
    identifyer {108dc9d9-7b82-11e3-91ad-806e6f6e6963}
    description Fedora

    Приложение микропрограммы (101fffff)
    -------------------------------
    identifyer {108dc9da-7b82-11e3-91ad-806e6f6e6963}
    description Fedora

    Приложение микропрограммы (101fffff)
    -------------------------------
    identifyer {108dc9db-7b82-11e3-91ad-806e6f6e6963}
    description Fedora

    Приложение микропрограммы (101fffff)
    -------------------------------
    identifyer {108dc9dc-7b82-11e3-91ad-806e6f6e6963}
    description UEFI: Slimtype DVD A DS8A8SH

    Приложение микропрограммы (101fffff)
    -------------------------------
    identifyer {3c0d3aea-7ae3-11e3-8606-806e6f6e6963}
    device partition=\Device\HarddiskVolume3
    description UEFI: ST9500325AS

    Приложение микропрограммы (101fffff)
    -------------------------------
    identifyer {7303e52a-7b23-11e3-be7d-806e6f6e6963}
    device partition=\Device\HarddiskVolume3
    path \EFI\FEDORA\shim.efi
    description Fedora

    Приложение микропрограммы (101fffff)
    -------------------------------
    identifyer {90689028-7aea-11e3-be7a-806e6f6e6963}
    description Fedora

    From the Super Grub2 Disk interface, after choosing "detect any OS", I can see the following list:

    (hd1,gpt2)efi/Boot/fallback.efi
    (hd1,gpt2)efi/Boot/bootx64.efi
    (hd1,gpt2)efi/fedora/gcdx64.efi
    (hd1,gpt2)efi/fedora/grubx64.efi
    (hd1,gpt2)efi/fedoraMokManager.efi
    (hd1,gpt2)efi/fedora/shim-fedora.efi
    (hd1,gpt2)efi/fedora/shim.efi
    (hd1,gpt2)efi/Microsoft/Boot/bootmgfw.efi
    (hd1,gpt2)efi/Microsoft/Boot/bootmgr.efi
    (hd1,gpt2)efi/Microsoft/Boot/memtest.efi
    (hd1,gpt2)efi/oem/Boot/bootmgfw.efi
    (hd1,gpt2)efi/oem/Boot/bootmgr.efi
    (hd1,gpt2)efi/oem/Boot/memtest.efi

    So I guess that you may be right. Then how shall I manually change those? Will indeed appreciate your idea! Thanks!
      My System SpecsSystem Spec

  7. #7


    Posts : 5,360
    7/8/ubuntu/Linux Deepin


    You can try Pguru Pro ( unregistered version ).

    Data recovery, partition management and disk utilities - Eassos PartitionGuru. You should be able to get the partition using that and rename stuff.


    I don't have efi or fedora, but I would try renaming the fedora efi folder to -e.g. "fed-efi" and see if it picks up the ms efi folder. Not sure why it isn't going for bootmgw.efi first.

    If that does it, then you can delete the fedora folders once you are sure all is ok.
      My System SpecsSystem Spec

  8. #8


    Moscow
    Posts : 8
    Windows 8


    I have installed the Partition Guru. Renamed 'fedora' folder in EFI to 'fed-efi'. No effect. Still Grub appears at start and offers to boot either Fedora or Windows. Looks like clean install is the only effective option (?) but I am afraid to make a mistake...
      My System SpecsSystem Spec

  9. #9


    Posts : 5,360
    7/8/ubuntu/Linux Deepin


    Not necessarily. The issue is with contents of the esp. I would boot up the install media, format ( not delete) the esp, then use bcdboot to recreate the windows boot files.
    bcdboot <windows partition letter>:\windows /s <esp partition letter>: /f ALL

    e.g. bcdboot e:\windows /s c: /f ALL

    I would be surpised if Fedora is doing that. Perhaps it is an oem implementation in the firmware which keeps reinserting the entries.
      My System SpecsSystem Spec

  10. #10


    Moscow
    Posts : 8
    Windows 8


    Thanks SIW2! The command you have provided is for formatting the ESP partition, isn't it?
    Will you be so kind to also explain how to recreate Windows boot files using bcdboot?
      My System SpecsSystem Spec

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