Windows 8 and 8.1 Forums


Windows 8.1 error 0xc000000f on boot - tried everything.

  1. #1


    Posts : 21
    Genuine Windows 8.1

    Windows 8.1 error 0xc000000f on boot - tried everything.


    • Operating system : Genuine Windows 8.1
    • Updates : All installed up to date including additional ones except one that caused some random slow downs.

    PC Specs :

    1. CPU : Intel i3 2x3.3 GHz (LGA 1155)
    2. Mobo : Gigabyte GA-H61M-S1 (rev 2.0)
    3. RAM : Geil Dragon 2x 4GB
    4. GPU : Nvidia Geforce GT630 1GB

    5.HDDs :

    • 120 GB Samsung SSD (Home for OS)
    • 240 GB Kingston SSD (More important files)
    • 300 GB Seagate Barracuda SATA II mechanical drive (for less important files)
    Problems :

    • Recently I noticed that explorer.exe started to crash from time to time (example: right clicking on a file was giving a 'stand-by' icon and caused explorer.exe to follow a loop of crashing and reloading). A simple restart was helping.
    • Few days ago I hooked up my Roland MV 8000 digital music production hardware via USB to my computer in order to transfer some audio samples to the machine. At that moment when I was waiting for folders to pop up upon successful connection, explorer.exe crashed again but it didn't reload. My MV 8000 froze as well. I decided to manually restart my pc with a dedicated button. Unfortunately upon restart I got the following message :

    Loading operating system... a disk read error occured. Press ctrl+alt+del to restart
    What I've tried :

    1. Prepared bootable usb drive with Windows 8.1. Tried to automatically repair the problem using windows built in troubleshooting tool. Prompted an information that automatic repair could not repair this computer.
    2. Reconnected the Samsung SSD cables.
    3. Pulled out the Samsung SSD and hooked it via Sata adapter to my laptop:

      • Ran diskmgmt.msc command, checked partitions. There is a system partition of 300 mb which lists 0 items upon opening and an unknown size partition that prompts read error when trying to access. System partition has NTFS file system and the unknown size partition has RAW file system.
      • Ran hdtune, checked overall health of the drive using S.M.A.R.T. data as well as checked for bad sectors. All fine.

    4. Hooked drive back to pc, booted to windows 8.1 from usb thumb drive:

      • Accessed command prompt and tried the following :

    bootrec /scanos
    bootrec /rebuildbcd
    bootrec /fixmbr
    bootrec /fixboot
    and
    bcdedit /export C:/BCD_Backup
    C:
    cd boot
    attrib bcd -s -h -r
    ren c:/boot/bcd bcd.old
    bootrec /Rebuild Bcd
    All operations were successful. However, in command prompt there was an information that
    'total identified Windows installations: 0'
    1. From windows 8.1 installer I have chosen troubleshoot and tried to boot up windows 8.1 in multiple types of safe mode. However I was always given the following information:

    Windows Boot Manager
    Windows failed to start. A recent hardware or software change might be the cause. To fix the problem :
    1. Insert your windows installation disc and restart your computer.
    2. Choose your language settings, and then click 'next'.
    3. Click Repair your computer

    If you do not have this disc, contact your system administrator or computer manufacturer for assistance.

    status: 0xc000000f

    info: the boot selection failed because a required device is inaccessible.

    P.s. I did follow this tutorial on converting RAW file system back to NTFS, tried to perform automatic repair without any positive output (even log file is not saved...). I swear that it seems like Windows 8.1 is just a windows vista with new theme. Why can't you guys just focus on modifying the core of the system so it provides better security and stability overall ?

    There are no alternatives to Windows when it comes to budget computers. Even most programs don't have their alternative versions for mac or ubuntu. I think that if Microsoft holds a huge monopol on the market and you - as a user - basically can't escape it then they should release quality products. One day people will get anger spasms, survive few months without pc and buy something that suits their needs better. Where is customer support for the faulty thing I bought ?

    I kindly ask for help as I've ran out of ideas. Thanks in advance.

      My System SpecsSystem Spec

  2. #2


    Harrisonburg, Va.
    Posts : 10,488
    Windows 8.1.1 Pro with Media Center


    Have you tried running-

    Dism /Online /Cleanup-Image /RestoreHealth

    &

    sfc /scannow

    in admin cmd prompts & restarting ?
      My System SpecsSystem Spec

  3. #3


    Posts : 21
    Genuine Windows 8.1


    Hi David and thanks for such a quick response. I did not try the first command. I understand that first command breaks into few separate lines or am I supposed to type it all in one row ?

    Also - the only access to command prompt that I have is by inserting a bootable usb thumb drive and by using troubleshoot option accessing it.
      My System SpecsSystem Spec

  4. #4


    Harrisonburg, Va.
    Posts : 10,488
    Windows 8.1.1 Pro with Media Center


    Quote Originally Posted by Daniel1992 View Post
    Hi David and thanks for such a quick response. I did not try the first command. I understand that first command breaks into few separate lines or am I supposed to type it all in one row ?

    Also - the only access to command prompt that I have is by inserting a bootable usb thumb drive and by using troubleshoot option accessing it.
    Use copy & paste to insert the dism cmd.
    Copy it & put the cursor at the blinking cursor in the cmd prompt & right click & it will be pasted in.

    As long as you can get an administrator command prompt go for it.

    edit-

    Click image for larger version
      My System SpecsSystem Spec

  5. #5


    Harrisonburg, Va.
    Posts : 10,488
    Windows 8.1.1 Pro with Media Center


    It just occured to me you may be responding from another computer.
    In that case just type it in being careful of the spaces in the cmd.
      My System SpecsSystem Spec

  6. #6


    Posts : 2,690
    Windows 3.1 > Windows 10


    you do realize that running those command in a PE envoriment are just running the commands on the booted OS..

    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
      My System SpecsSystem Spec

  7. #7


    Harrisonburg, Va.
    Posts : 10,488
    Windows 8.1.1 Pro with Media Center


    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..

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

    where C above 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
    Thanks.
    You can help better than I can.
      My System SpecsSystem Spec

  8. #8


    Posts : 2,690
    Windows 3.1 > Windows 10


    to verify that your OS is on partition C or to get the assigned drive letter

    type> diskpart
    type> list volume

    look for the drive letter assigned to your OS partition (and use it in place of C )
      My System SpecsSystem Spec

  9. #9


    Posts : 21
    Genuine Windows 8.1


    Quote Originally Posted by David Bailey View Post
    Quote Originally Posted by Daniel1992 View Post
    Hi David and thanks for such a quick response. I did not try the first command. I understand that first command breaks into few separate lines or am I supposed to type it all in one row ?

    Also - the only access to command prompt that I have is by inserting a bootable usb thumb drive and by using troubleshoot option accessing it.
    Use copy & paste to insert the dism cmd.
    Copy it & put the cursor at the blinking cursor in the cmd prompt & right click & it will be pasted in.

    As long as you can get an administrator command prompt go for it.

    edit-

    Click image for larger version
    Thanks and yes I am using an old IBM T61 that survived 3rd world war and atomic fallout. Works like a charm, even keyboard glows . I'm booting up right now on my pc and will give a try with the commands you've provided me with.

    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


    The letter of my OS partition is 'I:' however it does not have any label (i.e. 'reserved by system'). Upon booting up from my thumb drive I am in X:/sources/ directory. When I type 'cd I:' or 'cd I:/Windows/', command line prompts X:/sources/ like before. I don't understand what is this directory.
      My System SpecsSystem Spec

  10. #10


    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.
      My System SpecsSystem Spec

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