Unresolvable BSOD on boot

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  1. Posts : 374
    W10 22H2 19045.4355
       #11

    sluice said:
    The C: drive is an SSD plugged into the motherboard and so not removable, unfortunately. I did it that way for speed of access. and to make it awkward for myself in the event of a failure. I suspect a power outage which happened during the early boot stage might have buggered the SSD.
    There is no need unless it has proven deffective to unplug the SSD and replace it.

    If you, as you wrote can access drive C SSD by booting from a USB and you can see all the files and folders then I can practically guarantee you it's very unlikely a defect in the drive but in the boot configuration something got messed up.

    I have had it that the critical BCD file got corrupted by a system crash once and damaged/wiped out.
    If you have any disk I/O e.g. during boot or otherwise and a power outage and your machine shuts down you have guaranteed damaged a.k.a. corrupted files! ( don't try it, but imagine driving 60 mph in a car and open the door and get out... however, totally safe if you come to full stop first! Same principal with data devices.

    So to eliminate a few variables and clear the path to get this to work for you:
    when you boot from a USB and run a chkdsk of your drive C SSD doesn't come back error-free and/or some minor issues corrected?
    If yes then you drive is okay and we got that out of the way.
    The next step would be to look at the BCD.
    But you have written before assuming that you followed the instruction I gave you, that you did not get BCD file contents to see after you entered the provided string. Did you do it correctly? You do need to assign a drive letter to the FAT32 and pointing that string to that drive letter.

    What error message did you get?
    "the boot configuration data store could not be opened" or "the system cannot find the file specified"?

    For example:
    bcdedit /store c:\efi\microsoft\boot\bcd will get you nothing because the boot information is not there it's in the FAT32 (EFI) partition.
    If you assign a [FREE& AVAILABLE] drive letter to it for example:
    -I just tested it on my machine here- I assigned to the FAT32 partition the drive letter K

    And then when you enter at the prompt ( in this example case): bcdedit /store K:\efi\microsoft\boot\bcd
    It will show the BCD file contents!
    Tthat is of course if there is a BCD file there in the first place!





    Be aware of you will get a lot of advice here but keep in mind "too many cooks spoil the broth".
    The more you fiddle around with things you don't know or not sure about, the more likely you can ruin or wreck something that just had one tiny little file missing or an entry error and would have been easily to fix!
      My Computer


  2. Posts : 374
    W10 22H2 19045.4355
       #12

    How to find the UEFI boot partition and look at the BCD file


    sluice said:
    The C: drive is an SSD plugged into the motherboard and so not removable, unfortunately. I did it that way for speed of access. and to make it awkward for myself in the event of a failure. I suspect a power outage which happened during the early boot stage might have buggered the SSD.
    Mea Culpa!
    just noticed that I actually had written you something incorrect in the first reply. That is likely you don't get anything when trying the BCD string.
    Here's the correction, the changes highlighted in red:

    Do and answer this first:
    1. Just in case, post a screenshot of the BSoD, specifically the code and/or filename if shown. (take it with her cell phone camera or simply write it down.)
    2. Does your system boot is BIOS or UEFI?
    3. Can you boot in safe mode?
    4. If yes, there is a already the answer to where the problem lies!
    5. If no, what happens?
    6. Boot from a Windows PE version from an external device i.e. USB stick (or as used to be DVD).
    7. If you succeed open a CMD window (it would be likely X:/sources> we need to know what the drive letter assignment is for your actual boot drive C:\
    8. Before we go further type in that cmd window notepad a copy of Notepad will start which we will need later.
    9. Back to the CMD window, let's find out what you currently assign
    10. A simple way to do that is type at the prompt diskpart
    11. You will get a new prompt DISKPART>
    12. Type in: list disk ...press enter
    13. You will get a list of all your disks.
    14. If you have more than one disk make sure you select the right one containing the OS.
    15. Type in: sel disk# (# being the number as listed before)
    16. It will tell you that disk# is selected
    17. Type in: list vol
    18. Now you will see a list of all the volumes with drive letter, label etc.
    19. Look for the volume that represents your EFI partition, (~100MB FAT32) and note what drive letter it has been assigned.
    20. If no drive letter -which can be perfectly normal- you must assign a drive letter.
    21. While still there in DISKPART> and the volume list does not show a drive letter for the FAT32,[which typically has no drive letter] you must do the following:
    22. list vol ...press enter
    23. Look for the volume # [the volume number] that is the ~100MB FAT32 partition
    24. sel vol #[the volume number]...press enter
    25. The system will respond with: "volume # is the selected volume"
    26. Now you need to use a letter that has not been used yet. You can see the ones that are used in the volume list prior.
      in this example we will use the letter L assuming it's not been used.
    27. At the DISKPART> prompt type (or copy):
    28. assign letter=K ...press enter
    29. the system will respond with: "disk part successfully assign the drive letter or mount point"
    30. Type: exit and press enter at the DISKPART> prompt and you're back out and done.


    Now that we know under which drive letter at the moment all is, type in the following at your regular prompt as explained earlier:
    (For BCDedit to work and show you the right info you must tell the computer where to look, hence the question earlier, does your system boot is BIOS or UEFI?)
    • If BIOS, type in: bcdedit /store #:\Boot\BCD and enter.
    • If UEFI, type in: bcdedit /store #:\efi\microsoft\boot\bcd and enter.

      (Whereas # is the assigned [EFI partition (~100MB, FAT32)] drive letter as mentioned before.)


    For EFI:
    If you assign a [FREE& AVAILABLE] drive letter to it for example:
    -I just tested it on my machine here- I assigned to the FAT32 partition the drive letter L

    And then when you enter at the prompt ( in this example case): bcdedit /store L:\efi\microsoft\boot\bcd
    It will show the BCD file contents!
    ( if not then either the BCD is missing, or you have a BIOS boot or the file is damaged and corrupted.)

    Report back!
    Last edited by 3Bit; 2 Weeks Ago at 17:25.
      My Computer


  3. Posts : 374
    W10 22H2 19045.4355
       #13

    hsehestedt said:
    LOL. Criticize away . Yeah, I rushed my reading of the post. I saw that it was repeatedly rebooting and got hung up on the question of how to access the event log files. I neglected to gather that it was rebooting often enough (or early enough in the boot process) that files were not accessible.

    In this case, you could always connect the drive to another system (if that is even practical) and access the logs at %SystemRoot%\System32\Winevt\Logs\.
    No worries we all lay an egg now and then!
    There are some that surpass yours and they're even in print!

    More than once somewhere I read on paper but also online, that if you have a problem having no connection, to go online or to access websites with your computer by going to the following website and contact support...



    Is that why people eat Cheerios is for breakfast?
    Last edited by 3Bit; 1 Week Ago at 22:20.
      My Computer


  4. Posts : 5,333
    Windows 11 Pro 64-bit
       #14

    Does the BSOD screen display the name of which driver caused the error message?
      My Computer


  5. Posts : 16
    Windows 10 Insider
    Thread Starter
       #15

    I;m not sure how to label an unnamed volume 5 (Hidden, FAT32, 99MB) in order to see/create the BCD. I have the screen shots of diskpart commands on my OneDrive but need an ID to share with.
      My Computer


  6. Posts : 374
    W10 22H2 19045.4355
       #16

    sluice said:
    I;m not sure how to label an unnamed volume 5 (Hidden, FAT32, 99MB) in order to see/create the BCD. I have the screen shots of diskpart commands on my OneDrive but need an ID to share with.
    Did you read my post/answer #12 to your prior question?
    if you want me to help you, you need at least respond and interact with what I recommend you to do!
      My Computer


  7. Posts : 16
    Windows 10 Insider
    Thread Starter
       #17

    Hi 3Bit, I have one fAT32 partition, 99MB now assigned N:. I can see BCD in the boot folder, 57KB, but bcdedit doesn't come up with anything. I typed in bcdedit /store N:\efi\microsoft\boot\bcd, just the list of diskpart commands.
      My Computer


  8. Posts : 803
    WIN 10 19045.4412
       #18

    I don’t see the sense of all these instructions
    When you are able to boot up to the „advanced options“ your BCD can’t be damaged!!

    Unresolvable BSOD on boot-advanced_option.png
    You don’t have to search the BCD! In "Command Prompt" you just type bcdedit and you get it!

    Your sfc-command is wrong! You have to use the command for an offline image

    sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows

    to find out if (C:) is correct, type:

    diskpart
    list vol
    exit
    before you execute the sfc-command
    Last edited by Pentagon; 1 Week Ago at 12:17.
      My Computer


  9. Posts : 16
    Windows 10 Insider
    Thread Starter
       #19

    I tried rebooting after selecting the boot drive to be the SSD in UEFI, on startup it offered Windows 10 or 11 (11 won't work on my PC) and it booted into Win10 OK. After reading some emails, I rebooted again and it went into a blue screen offering Command Prompt and my name in a box. Entering brings up a password demand which I enter my current Windows pw. It tells me that is incorrect and goes on to tell me to find the administrator, etc.
      My Computer


  10. Posts : 803
    WIN 10 19045.4412
       #20

    Sorry, can't help. The problem description is confusing. Now the boot menue offers you WIN11, and a password is needed etc.
    WIN 10 Recovery needs a password. WIN 11 not.
      My Computer


 

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