I messed up my bootloaders bad. (BCDboot help)

Page 1 of 4 123 ... LastLast

  1. Posts : 14
    Windows 10
       #1

    I messed up my bootloaders bad. (BCDboot help)


    I’ve got an old Acer AspireX running windows 10. Tuesday night, I tried to install the update for 21H2 and for whatever reason, it broke something with my boot files, causing windows to get stuck in the “automatic startup repair” loop. Would run diagnostics then stay on “attempting to repair your PC” indefinitely.

    Thought I could fix it myself so I booted into recovery mode and started trying some solutions I could find online.

    ran chkdsk- nothin

    ran sfc /scannow - nothin

    Finally came across some solutions regarding my BCD. Without reading the fine print, I ran

    Code:
    bcdboot c:\windows /s c:
    And now I’m getting 0xc0000001 and 0xc0000098 blue screens immediately after startup. The xc98 screen directs to the file "\BCD" but that file doesn't even exist in my C: root or Windows directory (tried doing "ren BCD BCD.old" so I could rebuild but it said there was no such file in either directory, only in \Windows\Boot).

    After getting a slightly better understanding of what that command actually does, i then started trying to fix THAT. Tried rebuilding my bcd multiple times in many different ways.

    At some point along the way, i followed another solution guide that involved running BCDboot on another disk volume (it was one of the unnamed FAT32 volumes but was supposedly a container for some boot files. As you can tell, this is where I am completely in the realm of “**** am i doing”)

    I boot my computer now and press F12 to see the boot device list and see 3 duplicate boot managers, none of which work.

    SOS.

    FAQ:

    “did you try restoring to a backup point?” Yes. When i go through the advanced recovery options to select a restore point, there is only 1 available and windows got stuck on the “restoring files” step (left it for over 2 hours)

    “do you have a bootable installation media” yes, I have a USB, fully accessible but has a 1709 build which apparently blocks me from running bootrec /fixboot (throws a “access is denied” error)

    “can you reinstall windows” yes, I have been able to access the restore option but I am trying to avoid it still because i have a lot of programs for work on this computer that will suck to reinstall

    Any help is greatly appreciated!
      My Computer


  2. Posts : 8,057
    windows 10
       #2

    ​Welcome to the forum. First thing is the disk MBR or ufeiufei how many disk do you have? If you could post a screen shot from disk manager would help. Magnum's reflect has a boot fix option
      My Computer


  3. Posts : 14
    Windows 10
    Thread Starter
       #3

    It's a UEFI, single disk. Here's a pic of my diskpart
    I messed up my bootloaders bad. (BCDboot help)-image-ios-1-.jpg
      My Computer


  4. Posts : 21,421
    19044.1586 - 21H2 Pro x64
       #4

    Hello plumguy1 and welcome to TF ,

    If you have another working Windows PC available:
    1. Install Macrium Reflect: Backup and Restore with Macrium Reflect
    2. Make a MR Rescue USB
    3. Boot your dead PC from that USB and select the option to repair boot problems.

    This could save you a lot of time and aggravation if it works and you're learn about a backup tool we recommend here to make frequent backups to recover from this sort of headache quickly.
      My Computer


  5. Posts : 15,441
    Windows10
       #5

    steve108 said:
    Hello plumguy1 and welcome to TF ,

    If you have another working Windows PC available:
    1. Install Macrium Reflect: Backup and Restore with Macrium Reflect
    2. Make a MR Rescue USB
    3. Boot your dead PC from that USB and select the option to repair boot problems.

    This could save you a lot of time and aggravation if it works and you're learn about a backup tool we recommend here to make frequent backups to recover from this sort of headache quickly.
    Yep - this is the first thing I try as it usually sorts things. It basically deletes the old bcd and rebuilds from scratch.
      My Computer


  6. Posts : 21,421
    19044.1586 - 21H2 Pro x64
       #6

    cereberus said:
    Yep - this is the first thing I try as it usually sorts things. It basically deletes the old bcd and rebuilds from scratch.
    I've seen in recommended and then experienced it's magical healing powers myself I prefer this route than getting my PhD in bcdboot as I rarely have to do that sort of stuff.
      My Computer


  7. Posts : 14
    Windows 10
    Thread Starter
       #7

    Thanks for the tips! Unfortunately, no luck. I booted up the MR USB and followed the "Fix windows boot problems" prompt but as soon as it restarted my PC, it just went back to the same BSOD with the 0xc0...98 code.
      My Computer


  8. Posts : 21,421
    19044.1586 - 21H2 Pro x64
       #8

    Thanks for the update.

    Maybe @NavyLCDR or someone else will have a suggestion for you on how to fix this with commands.
      My Computer


  9. Posts : 41,412
    windows 10 professional version 1607 build 14393.969 64 bit
       #9

    Please create some tools to troubleshoot the boot failure, test the drive, and backup files.

    Find several flash drivers (> or = 8 GB).

    or

    Find one large flash drive and use Ventoy:
    Ventoy

    Create the following bootable flash drives:

    a) Bootable Sea Tools flash drive:
    SeaTools | Seagate Support US

    b) Bootable Ubuntu /Linux flash drive:
    Create a bootable USB stick with Rufus on Windows | Ubuntu

    c) A new bootable Windows 10 iso flash drive:
    Create Bootable USB Flash Drive to Install Windows 10
    Download Windows 10 ISO File
    https://www.microsoft.com/en-us/soft...load/windows10


    1) Test the disk drive with the bootable Sea Tools flash drive:
    Run the Sea Tools long generic test > report results or post images into this thread

    2) Boot using the Ubuntu flash drive > backup important files using the Graphical User Interface (GUI)

    3) Decide whether you want to custom install Windows 10, clean install Windows 10 or troubleshoot the failure to boot:
    Custom Install Windows 10
    How to Restore Files from Windows.old Folder in Windows 10
    Clean Install Windows 10

    (Both a custom install and clean install require the reinstallation of drivers and applications)
    (The custom install will save computer files to a new Windows.old)
    (Important files are then restored from Windows.old)


    If you want to troubleshoot some steps that were already performed may be repeated.

    Post images of these commands with results:

    Code:
    diskpart
    lis dis
    lis vol
    sel dis 0
    det dis
    lis par
    sel par 1
    det par
    sel par 2
    det par
    sel par 3
    det par
    sel par 4
    det par
    sel par 5
    det par
    sel par 6
    det par
    sel par 7
    det par
    exit

    Code:
    bcdedit /enum all
    bcdedit | find "osdevice"

    Code:
    bootrec /fixmbr
    bootrec /fixboot
    bootrec /scanos
    bootsect /nt60 all

    reboot

    report findings > post images


    Code:
    bcdedit /set {current} recoveryenabled No

    reboot > post images of the error message and/or code
      My Computer


  10. Posts : 14
    Windows 10
    Thread Starter
       #10

    Thanks zbook, that Ubuntu backup trick is super good to know. Took forever though, I have a lot of files on here.

    Seagate test gave 100% pass. Had trouble running the bootrec commands though which I did before without issue. It started throwing a "The system cannot find the file specified" error. Tried on the boot volume as well as C:. /RebuildBCD found my windows installation but I didn't add it to the boot list cuz I wanted to show you guys here first. Pictures incoming (though my computer is struggling with adding the pics for some reason)

    - - - Updated - - -

    Pics attached

    - - - Updated - - -

    I messed up my bootloaders bad. (BCDboot help)-image-ios-8-.jpgI messed up my bootloaders bad. (BCDboot help)-image-ios-9-.jpgI messed up my bootloaders bad. (BCDboot help)-image-ios-7-.jpg
    Attached Thumbnails Attached Thumbnails I messed up my bootloaders bad. (BCDboot help)-image-ios-12-.jpg   I messed up my bootloaders bad. (BCDboot help)-image-ios-11-.jpg  
      My Computer


 

  Related Discussions
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 04:22.
Find Us




Windows 10 Forums