INACCESSIBLE BOOT DEVICE on startup

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  1. Posts : 69
    Windows 10 Pro x64
    Thread Starter
       #11

    Kbird said:
    When I have seen this message before , it was a Bios Post message not a BSOD and it was because an Update had screwed up the Order of the Boot Devices in the Bios and it was trying to boot off D:\ instead of C:\ when I went into the Bios to check the Boot Order, so I set the 1st device back to Windows Boot Manager and all was Well.

    KB.
    I can confirm that as well. I've paused the updates for now until February or something and all is well now. So I guess problem solved. Thank you all for help! :)
      My Computer


  2. Posts : 1
    Windows 10
       #12

    Stop that


    zablablukas said:
    Hello! I've just tried turning on my PC and it shows me a BSOD saying INACCESSIBLE BOOT DEVICE. Yesterday everything was fine. I turned it off normally like always. I haven't updated any drivers either and there are no external drives or USBs connected. I liked for some solutions but none worked. I tried booting into safe mode (got the same error), I checked if my SATA options werr on AHCI (which they were). What do I do? I don't want to lose all my data!
    If you did not format anything yet, try this solution:

    Inaccessible Boot Device nach Update bei Windows 10 - die IT werkstatt Kiel

    If you dont understand german and google translator wont help you:

    you have to recover the registry backup from /windows/system32/config/regback to /windows/system32/config and rename the reg files. Before that, do a backup at least from /winsows/system32/config
      My Computer


  3. Posts : 39,972
    windows 10 professional version 1607 build 14393.969 64 bit
       #13

    When the computer is powered on now what do you see and hear?

    Use the windows 10 iso > windows advanced troubleshooting menu > command prompt
    Use a camera or smart phone camera to take pictures and post images into the thread:
    1) diskpart
    2) list disk
    3) select disk 0
    4) list partition
    5) exit
    6) c: dir
    7) d: dir
    exit
      My Computer


  4. Posts : 6
    Windows 10
       #14

    Bcod


    Hello,
    after regular update, my PC will not start, all I get is INACCESSIBLE BOOT DEVICE Error and DSOD. I can still access windows advanced troubleshooting menu > command prompt and I have been trying and trying. I have also managed to update the BIOS but no luck. I have followed tutorial from zbook, post 2. Since in step 14 I had osdevice partition=F, I typed chkdsk /r F: in step 19 - is it correct? But Im not sure what to type in step 20 instead of G...?
    Can you please help me?
    Printscreen: Dropbox - 20180315_001242.jpg
    Last edited by Alessandro; 14 Mar 2018 at 18:42. Reason: link to printscreen
      My Computer


  5. Posts : 6
    Windows 10
       #15

    OK I guessed and typed: sfc /scannow /offbootdir=F:\ /offwindir=F:\windows - seems to be running now:
    Dropbox - 20180315_005321.jpg
      My Computer


  6. Posts : 6
    Windows 10
       #16

    And I cannot continue, because after typing bootrec /fixboot, I see Access is denied.
      My Computer


  7. Posts : 6
    Windows 10
       #17

    And when I power on, it is still the sam BSOD, starting in Safe Mode not possible either, nor the restore point is working, nothing so far...this is mad
      My Computer


  8. Posts : 39,972
    windows 10 professional version 1607 build 14393.969 64 bit
       #18

    The problem with inaccessible boot device in January was related to Spectre and Malestrom.
    Microsoft responded with Windows updates that had unexpected problems:
    inaccessible boot device
    problems with USB ports
    These are the published fixes:

    https://support.microsoft.com/en-us/...stalling-the-j
    https://support.microsoft.com/en-us/...ry-13-2018-upd
    https://support.microsoft.com/en-us/...date-kb4074588
    https://support.microsoft.com/en-us/...ectre-meltdown
    https://support.microsoft.com/en-us/...build16299-251
      My Computer


  9. Posts : 6
    Windows 10
       #19

    Thank you, first I removed this one:
    dism.exe /image:c:\ /remove-package /packagename:Package_for_RollupFix~31bf3856ad364e35~amd64~~16299.248.1.17 and it did not help, the previous package is not installed...
    Any idea what can I do please?
      My Computer


  10. Posts : 39,972
    windows 10 professional version 1607 build 14393.969 64 bit
       #20

    For these steps please use a camera or smart phone camera to take pictures and post images into the thread:
    command prompt > Administrator X:\windows\system32\cmd.exe > X:\Sources> type:
    1) c:
    2) dir
    3) d:
    4) dir
    5) e:
    6) dir
    7) f:
    8) dir
    9) g:
    10) dir
    11) bcdedit /enum
    12) bcdedit | find "osdevice"
    12) diskpart
    13) list disk
    14) list volume
    15) select disk 0
    16) list partition
    17) select partition 1
    18) detail partition
    19) select partition 2
    20) detail partition
    21) select partition 3
    22) detail partition
    23) select partition 4
    24) detail partition
    continue in this fashion for all partitions on disk 0
    and please continue in this fashion for disk 1
    exit

    Fix: bootrec /fixboot access denied in Windows 10

    If the above fails there is another option
      My Computer


 

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