Windows 10: bootrec /scanos or bootrec /rebuildbcd not working

Discus and support bootrec /scanos or bootrec /rebuildbcd not working in Windows 10 BSOD Crashes and Debugging to solve the problem; Hello recently my system got a BSOD while downloading something which led to corruption of system files, i was able to correct them using sfc/scannow... Discussion in 'Windows 10 BSOD Crashes and Debugging' started by dragonballz4, Nov 30, 2020.

  1. bootrec /scanos or bootrec /rebuildbcd not working


    Hello recently my system got a BSOD while downloading something which led to corruption of system files, i was able to correct them using sfc/scannow and chkdsk /s /r , i can boot into windows normally but whenever i try to boot into windows recovery environment, i get the BSOD saying its not available/accessible, i figured it might be due to corrupted mbr and try to run commands according to this but i get responses exactly as mentioned here https://answers.microsoft.com/en-us/...b-fdcfce9f9c43 except /fixboot leads to element not found. I should also mention that i had recently cloned this system to the new ssd. this is the error i got before using chkdsk https://cdn.appuals.com/wp-content/u...c000000e-1.jpg and NTFS_FILE_SYSTEM. Is there any way to fix the windows recovery enviroment, can i recreate it?

    Also why am i getting this errors while trying to fix mbr, i tried marking the partition as active, tried bcdboot d:/windows which resulted into boot files cannot be copied, scanos just returns nothing not even 0 instlallations found, it just gives up, any help is appreciated. here is an image from disk management, it is mbr boot not uefi

    :)
     
    dragonballz4, Nov 30, 2020
    #1
  2. powerlien Win User

    bootrec /scanos or bootrec /rebuildbcd not working

    I'm getting an odd issue where if I run either command, they don't run all the way through. bootrec /scanos doesn't tell me how many (if any) installations of Windows were found, and bootrec /rebuildbcd tells me it might take a while, but then quits after
    a few seconds with no other words.

    Might be worth nothing that bootrec /fixboot returned as having denied access.

    Any thoughts?
     
    powerlien, Nov 30, 2020
    #2
  3. "bootrec /scanos" not working, "bootrec /rebuildbcd" not working, "bootrec /FixBoot" not working

    This answer from last year seemed to address the non-booting issue, but completely ignores the original problem statement, "Might be worth nothing that bootrec /fixboot returned as having denied access."

    bootrec /scanos or bootrec /rebuildbcd not working

    I understand how difficult it is, when the system doesn’t work in the way it should. For us to isolate the issue and to assist you further, we'd like to ask you a few questions.

    1. Does the computer boot to the desktop?

    [no it doesn't boot]

    2. Did you install multiple OS on your system?

    [no just the same, single windows 10 home edition]

    3. Why are you running those commands?

    [I transferred windows from HDD to NVME SSD using clonezilla, I subsequently formatted the HDD, the system booted once from the NVME but not again since.]

    I suggest you to create a bootable media and full the command mention below, Refer this article on

    How to access Windows Recovery Environment (WinRE) thru Windows 10 Media Creation Tool / DVD ISO
    to access WinRE Advanced options.

    1. Click on Command Prompt.

    2. In the Command Prompt, type in or copy/paste the given below line of commands one after the other. Ensure to press/hit Enter after inserting each command.

    Diskpart

    sel disk 0

    list vol

    3. Verify the EFI partition by using the FAT32 file system as well as to assign a drive letter with it. Type these commands in Command Prompt and press Enter after each of them.

    sel vol <number of volume>

    assign letter=<drive letter>:

    exit

    4. Repair the Boot record by running following Commands, type one at a time as well as hit the Enter button from keyboard.

    cd /d <drive letter>:\EFI\Microsoft\Boot\

    bootrec /FixBoot

    [all good up to this point, when I execute this command it comes back "Access is denied."]

    5. Now you need to rebuild the BCD store again, type the command below and press Enter.

    ren BCD BCD.old

    [this worked]

    6. Recreate it by running the given line of command.

    bcdboot c:\Windows /l en-us /s <boot letter>: All

    [this seemed to work if I add /f: "bcdboot c:\Windows /l en-us /s <boot letter>: /f All"]

    Hope it helps, Mithin EJ Microsoft Community - Moderator

    [nope, it changed nothing. I still cannot boot into Windows, the command "bootrec /FixBoot" still comes back, "Access is denied.", the command "bootrec /scanos" comes back with 0 instances of Windows, and "bootrec /rebuildbcd" also comes back with 0 instances.]
     
    KevinMoorman, Nov 30, 2020
    #3
  4. Ztruker Win User

    bootrec /scanos or bootrec /rebuildbcd not working

    Access denied on bootrec /fixboot

    These are the commands and how to run them. No reason you should get Access denied.
    Fix the MBR – Guide for Windows XP, Vista, 7, 8, 8.1, 10
     
    Ztruker, Nov 30, 2020
    #4
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bootrec /scanos or bootrec /rebuildbcd not working

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