Windows 8 and 8.1 Forums


Windows 8.1 error 0xc000000f on boot - tried everything.

  1. #11


    Posts : 21
    Genuine Windows 8.1


    Quote Originally Posted by hydranix View Post
    It looks like this to me:

    You were having weird issues with explorer.exe screwing up. (Likely unrelated)

    You plugged in your audio equipment, and Windows choked on the driver, so you hard reset your computer.

    Your filesystem data had not yet been flushed to disk, and was in the uncommon state of being very vulnerable for whatever reason.


    Massive filesystem corruption ensued. Your boot sector survived, one partition did not, and your boot partition lost all of its data, but somehow retained the filesystem.

    I could be wrong, maybe the SSD is just going bad, or needs to have some special low level configuration resets done. (easy to do)



    Either way, I'd bet that there is corruption across a bunch of your data. Hard resets can do that in some rare cases.

    You could troubleshoot this for hours if not days, running useless dism commands. (I hate how every single person here instantly suggest dism restorehealth and sfc scans, even without reading the posters problem. How many times has this really helped anybody...?)

    I'd just reinstall, then you can be sure that the MBR, partition boot flag, boot partition file system, bootloader, BCD, operating system filesystem, winload.exe, and windows system files are all as they should be.

    Filesystem corruption sucks.
    The stability of all Windows products is just horrible. Of course I can reinstall the os but what about the data that I have no access to right now (data that resides on hard drive with OS). Second thing is the stability in the future. Upon reinstalling I may encounter exactly the same problems as I'll continue to make music, write code, create vector graphics and eventually play battlefield 4 in spare time.

    Samsung SSD seems to be alright. Various S.M.A.R.T. data readers have confirmed it as well as hdtune when I scanned it for bad sectors. All seems to be nice and shiny. I already converted the RAW file system back to NTFS but for some reason I still have no access to the 2 partitions that reside on this OS drive.

    Quote Originally Posted by KYHI View Post
    you do realize that running those command in a PE envoriment are just running the commands on the booted OS..
    Quote Originally Posted by KYHI View Post

    to repair the system boot files from with the command prompt in WinPE

    where C below refers to the drive letter of your OS Partition

    type> C:\Windows\System32\bcdboot C:\Windows

    and the offline (when booted into winpe) dism command would be

    type> Dism /Image:C:\ /Cleanup-Image /RestoreHealth


    Ok, so I've tried the following : "
    Dism /Image:i:\ /Cleanup-Image /RestoreHealth" (notice that I have changed the 'C:' letter with 'i:' as for some unknown reason 'i' is right now a label corresponding to my os partition (?). I have achieved the following result :



    Error 1392

    It stated that the file or directory is damaged or unaccesible.

    Patient :



    Last edited by Daniel1992; 09 Jul 2015 at 08:46.

      My System SpecsSystem Spec

  2. #12


    Actually I take back my statement about reinstalling windows. That's a last resort. Maybe we can fix this.

    I can walk you through a full manual reconstruction of your systems boot process. If the system isn't totally screwed up, it will fix it.

    If you're up for it, you'll need to download my favorite tool for boot related headaches, and place it on the flash drive which you're using to boot the windows setup. (Add it to the windows install flash drive, so you can use the tool from within the PE enviroment)
    The Tool

    It's a powerful tool, so be careful when using it. I won't be online much longer, but if you get back to me within about 30 minutes, I'll stay on until we're done.
      My System SpecsSystem Spec

  3. #13


    Posts : 21
    Genuine Windows 8.1


    Sure, I would be glad for any help . I'm downloading the tool right now.

    EDIT : How am I supposed to insert the program executable file in windows 8.1 installation thumb drive without damaging it's ability to boot ?
    Last edited by Daniel1992; 09 Jul 2015 at 09:50.
      My System SpecsSystem Spec

  4. #14


    To place the tool on the USB flash drive, just drag and drop it directly onto it as if you were putting any other file onto a flash drive. It should still be able to boot without any trouble.



    Edit: Oh Ok, good thing I prepared the rest of the process before hand.
      My System SpecsSystem Spec

  5. #15


    Posts : 21
    Genuine Windows 8.1


    Hello again,

    No, no, I stated that it used to be RAW but I converted it to NTFS with the help of this tutorial : [FIX] Error "0xc000000f - The Boot Selection Failed Because A Required Device Is Inaccessible" - Kapil Sparks
      My System SpecsSystem Spec

  6. #16


    First we will just replace the MBR on the disk. Your MBR seems to work fine, but for sake of completeness we'll move up through the whole boot chain.


    ==Restoring the MBR==
    1) Boot the computer with the Windows Setup flash drive containing the tool I linked you.
    2) Get to a command prompt like you did previously.
    3) Type "notepad" and press enter.
    4) From within notepad, go to File>Open (ctrl+O)
    5) Select "My PC" on the left.
    6) Open the the flash drive.
    7) On the botton left, change the drop-down menu "Files of type:" from "Text Documents (*.txt)" to "All Files (*.*)"
    8) Navigate to where you placed the tool on the flash drive, right click it, and click "Open" (not "Select")
    9) In the first tab of the tool, for "Destination Disk" select your Windows OS drive (120GB Samsung)
    10) Click "Process MBR"
    11) Check the bottom box for "Windows NT 5.x / 6.x MBR"
    12) Click "Install / Config"
    13) Click "Windows NT 6.x MBR"
    14) Press "OK"
    15) Press "Close"




    We'll now format the filesystem on the boot partition


    ==Boot Partition Filesystem==
    1) Ensure the "Destination Disk" is still the Windows OS disk
    2) Click the button "Parts Manage"
    3) Select the first 300MB partiton
    4) Click "Format this part"
    5) Select "NTFS" as the filesystem
    6) Label is optional
    7) Reserved sectors is "16"
    8) Check the box "Optimize internal structure (4K-aligned)"
    9) Click "Start"
    10) Click "OK"
    11) Click "OK" again
    12) Click "Assign Drive Letter" then press "OK" (Unless the drive already has a letter)
    13) Select the Windows OS Partition (not the RAW, but the other)
    13) Click "Close"




    Now we'll fix the next step in the boot process. The PBR.


    ==Restoring the PBR==
    1) Ensure the "Destination Disk" is still the Windows OS disk
    2) Click "Process PBR"
    3) At the top, change "Destination Partition" to the 300MB boot partition that you just created the filesystem on.
    4) Make sure "BOOTMGR boot record (FAT/FAT32/NTFS/ExFAT" is checked.
    5) Press "Install / Config"
    6) Press "OK"
    7) Press "OK" again
    8) Press "Close"




    <<Next Post Will have the rest of the steps>>
      My System SpecsSystem Spec

  7. #17


    Posts : 21
    Genuine Windows 8.1


    Thanks so much ! I'll begin now, had to go buy myself 2x Heinekens as they are required to complete the boot sector restoration process
      My System SpecsSystem Spec

  8. #18


    Now we must populate the new boot partition manually.


    ==Populating The Boot Partition==
    1) Leave the tool open and now switch windows to the notepad open file box from earlier. (the explorer, from where you opened the tool)
    2) Go back to "My PC", and open your Windows OS drive.
    [Note: If you cannot access the Windows OS drive, substitute the drive X: for it and follow the same steps.]
    3) Open the "Windows\Boot\PCAT" directory.
    4) Select everything inside that directory, and right click, and click "Copy"
    5) Navigate back to "My PC", and open the boot drive from before.
    6) Create a new directory and name it "Boot"
    7) Paste the copied files inside the new "Boot" directory.
    8) From inside the new "Boot" directory, move the file "bootmgr" up one directory, so that its directly in the boot partition, instead of the "Boot" folder.
    9) Now you should have a 300MB partition, with 1 folder named "Boot", and 1 file named "bootmgr".




    Since I forgot to add earlier, we need to make the boot partition active.


    ==Activating the boot partition==
    1) Switch windows back over to the Tool.
    2) Ensure the "Destination Disk" is still the Windows OS disk
    3) Click "Parts Manage"
    4) Select the Boot Partition you've been working on so far.
    5) Click "Activate" button.
    6) Click "OK" (If theres a dialog)
    7) Click "Close"




    Now its time to semi-manually create a new BCD file.


    ==Creating the BCD Store==
    1) In the tool, switch tabs to the "BCD Edit" tab
    2) Click "Create New BCD"
    3) Navigate to, and save the file inside that "Boot" folder you created earlier. Name the file "BCD"
    4) Click "OK"
    5) Click the button "Easy Mode"
    6) Click the button "Add"
    7) Choose "New Windows 7/8/8.1 entry"
    8) In the "Boot Device" section, change the drop-down menu for "Disk:" to your 120GB Samsung SSD.
    9) Change the drop-down menu for "Partition:" to the Windows OS partition. (Not the boot partition you created, but the one that you converted from RAW to NTFS)
    10) In the "Options" section, change the entry for "OS title:" to whatever you prefer. (Optional, but recommended)
    11) Change the drop-down menu for "Language:" to whatever you prefer. (Optional, but recommended)
    12) Tick the box "Metro Boot Manager (Win8)"
    13) Click the button "Save current system"
    14) Click "Close"
    15) You can close the tool now by pressing "Exit"






    That should manually repair the whole boot process. Now you can close any open windows, causing the system to reboot.


    You can remove the flash drive, and I wish you luck that it boots.
      My System SpecsSystem Spec

  9. #19


    Posts : 21
    Genuine Windows 8.1


    Quote Originally Posted by hydranix View Post
    Now we must populate the new boot partition manually.


    ==Populating The Boot Partition==
    1) Leave the tool open and now switch windows to the notepad open file box from earlier. (the explorer, from where you opened the tool)
    2) Go back to "My PC", and open your Windows OS drive.
    [Note: If you cannot access the Windows OS drive, substitute the drive X: for it and follow the same steps.]
    3) Open the "Windows\Boot\PCAT" directory.
    4) Select everything inside that directory, and right click, and click "Copy"
    5) Navigate back to "My PC", and open the boot drive from before.
    6) Create a new directory and name it "Boot"
    7) Paste the copied files inside the new "Boot" directory.
    8) From inside the new "Boot" directory, move the file "bootmgr" up one directory, so that its directly in the boot partition, instead of the "Boot" folder.
    9) Now you should have a 300MB partition, with 1 folder named "Boot", and 1 file named "bootmgr".




    Since I forgot to add earlier, we need to make the boot partition active.


    ==Activating the boot partition==
    1) Switch windows back over to the Tool.
    2) Ensure the "Destination Disk" is still the Windows OS disk
    3) Click "Parts Manage"
    4) Select the Boot Partition you've been working on so far.
    5) Click "Activate" button.
    6) Click "OK" (If theres a dialog)
    7) Click "Close"




    Now its time to semi-manually create a new BCD file.


    ==Creating the BCD Store==
    1) In the tool, switch tabs to the "BCD Edit" tab
    2) Click "Create New BCD"
    3) Navigate to, and save the file inside that "Boot" folder you created earlier. Name the file "BCD"
    4) Click "OK"
    5) Click the button "Easy Mode"
    6) Click the button "Add"
    7) Choose "New Windows 7/8/8.1 entry"
    8) In the "Boot Device" section, change the drop-down menu for "Disk:" to your 120GB Samsung SSD.
    9) Change the drop-down menu for "Partition:" to the Windows OS partition. (Not the boot partition you created, but the one that you converted from RAW to NTFS)
    10) In the "Options" section, change the entry for "OS title:" to whatever you prefer. (Optional, but recommended)
    11) Change the drop-down menu for "Language:" to whatever you prefer. (Optional, but recommended)
    12) Tick the box "Metro Boot Manager (Win8)"
    13) Click the button "Save current system"
    14) Click "Close"
    15) You can close the tool now by pressing "Exit"






    That should manually repair the whole boot process. Now you can close any open windows, causing the system to reboot.


    You can remove the flash drive, and I wish you luck that it boots.

    Hello and huge thanks,

    Everything went smoothly until PBR section of this tutorial. I'm stuck exactly on step 4 which is : "4) Select everything inside that directory, and right click, and click "Copy"". Unfortunately I'm able to select only one directory at a time. CTRL+A shortcut does not work. Same for using mouse to manually select the directories. Also I've tried to select each element with left CTRL being pressed and performing a left click on each item. How to bypass this problem ?
      My System SpecsSystem Spec

  10. #20


    Sorry, my son was hungry and I forgot to press Post Reply.

    Quote Originally Posted by Daniel1992 View Post


    Hello and huge thanks,

    Everything went smoothly until PBR section of this tutorial. I'm stuck exactly on step 4 which is : "4) Select everything inside that directory, and right click, and click "Copy"". Unfortunately I'm able to select only one directory at a time. CTRL+A shortcut does not work. Same for using mouse to manually select the directories. Also I've tried to select each element with left CTRL being pressed and performing a left click on each item. How to bypass this problem ?


    If you're familiar with command prompt commands, you're essentially doing this:
    (For sake of the example "C:" is my Windows partition, and "B:" is my boot partition.)

    XCOPY C:\Windows\Boot\PCAT\* B:\Boot\ /E
    (copy everything inside C:\Windows\Boot\PCAT, into B:\Boot\)

    MOVE B:\Boot\bootmgr B:\
    (Move the file "B:\Boot\bootmgr" to "B:\bootmgr")


    You can use the command prompt as it makes it easier.
      My System SpecsSystem Spec

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