BSOD Error code: 0xc0000221 ntoskrnl.exe

  1.    #1

    BSOD Error code: 0xc0000221 ntoskrnl.exe

    BSOD says:
    Your PC/Device needs to be repaired.
    The OS couldn't be loaded because the kernel is missing or containing errors.
    Error code: 0xc0000221

    You'll need to use windows recovery tools

    Press Enter to try again
    Press F8 for Startup settings
    Press Esc for UEFI firmware settings

    i have a recovery dvd , can i run sfc /scannow from the recovery dvd like in win7 ?
    will windows 10 sfc repair the operating system from the recover dvd ?
    sfc /scannow /offbootdir=f:\ /offwindir=f:\windows

    new to windows 10 thank you
    computer will not start the operating system
    Last edited by klein5366; 20 Jul 2017 at 20:02.
      My ComputerSystem Spec

  2. Posts : 26,465
    windows 10 professional version 1607 build 14393.969 64 bit

    1) Were there any recent hardware or software changes?
    2) How old is the desktop?
    3) Is it the original drive?
    4) Is it a HD or SSD?
    5) How many drives are there?
    6) Has there been any drive problems?
    7) Had the drive been tested with any software drive tests: SMART short or long generic?
    8) Are your files backed up?
    9) Is there a backup image?

    When you use manufacturer recovery dvd media it behaves differently than creating a windows 10 iso dvd. The manufacturer dvd often has the option to reinstall the operating system but no option to repair (windows recovery or advanced troubleshooting menu). So if you boot to the dvd it will collect information and install windows. As long as you don't accidentally boot to the dvd I see little downside in attempting the sfc /scannow /offbootdir=f:\ /offwindir=f:\windows other than the amount of time that it may make in the repair. If it does not work there are other repair options.

    The error code 0xc0000221 indicates that problem could be related to a corrupted or missing driver file on the partition (could be fixed by scannow), disk errors (fixed by chkdsk /r) or RAM problems which may require hardware replacement.

    So as long as you are willing to wait while it attempts the repair there seems to be little downside.

    Please clarify what happens with these steps now:
    a) power on the computer
    b) power on the computer, power off when viewing the Microsoft icon (performed 2 or 3 times always powering off when viewing the Microsoft icon)
    c) power on changing the bios boot order to boot to the dvd

    If you can get to the windows recovery on the computer you should have options:
    reset save files
    reset remove files
    restore repair
    startup repair
    startup options
    command prompt

    If you cannot get to the Windows recovery or advanced troubleshooting menu on the computer and instead use a windows 10 iso as either a USB flash drive or dvd you should have these options:

    restore repair
    startup repair
    image repair
    command prompt

    If you launch command prompt it should open as: Administrator X: Windows\system32\cmd.exe
    You could then attempt the repair using the scannow command. You must be able to direct it to the dvd drive with the applicable drive letter in the command.

    If this command fails to fix the boot there are other repair options. Let us know your progress.

    These are some links for the error code 0xc0000221, sfc /scannow /offbootdir=f:\ /offwindir=f:\windows, F keys to boot to a device, and a free bootable windows 10 iso download.

    Bug Check 0xC0000221 STATUS\_IMAGE\_CHECKSUM\_MISMATCH | Microsoft Docs
    Run SFC Command in Windows 10 Windows 10 Customization Tutorials
    SFC /SCANNOW : Run in Command Prompt at Boot - Windows 7 Help Forums
    List of PC brands with their corresponding hot-keys
    Download Windows 10
      My ComputerSystem Spec

  3.    #3

    the computer i'm working on is my son's backup work computer
    more info as i get it lol
    computer had been setting unused and not running
    a week ago last Friday:
    they set it up it was fine.
    they had a company install a secure log in for a server.
    the software they use is on a server and they log into the server over the net.
    i would say it is something like Google sketch-up all through Internet explorer.
    it worker fine then the power went out at his work over the weekend.
    the next Monday morning the computer booted into the BSOD.

    lenovo c560
    mfg date 2014-05-19
    originally win 8.1 as per tag , but has 10 on it now
    only one drive
    he has no idea if it is the original drive
    no test has been done on the drive
    no back up i don't think there is any files on it he needs

    at the point i wrote my first post i did not know about the power outage, now i'm thinking it could be the culprit.

    now i'm faced with another problem i do not have a windows 10 repair disk or install disk, i do have a windows 7 install disk can i use that to get to the command prompt to run sfc ? or does it have to be windows 10 disk ?

    can it be a windows 10 disk repair disk from any computer?
    being it was upgraded and he doesn't have the disks, does he have to put win 8.1 back on or will the win 10 install ?

    if i download the windows 10 image will it install being the computer originally had windows 8.1 ?
    it is my understanding at this point the win coa is on a chip on the mother board, there is no windows coa on this computer.

    thanks a lot zbook for your time
    Last edited by klein5366; 24 Jul 2017 at 13:51. Reason: reformated
      My ComputerSystem Spec

  4. Posts : 26,465
    windows 10 professional version 1607 build 14393.969 64 bit

    1) See if you can find a flash drive that you can format.
    Windows 10 iso downloads are free and can be used on any computer with windows 10 home or professional.
    2) create a bootable windows 10 iso: Download Windows 10
    3) if the computer was upgraded from windows 7 or 8.1 to windows 10 during the free period the computer then has a digital license. This would allow you to replace hardware and software.
      My ComputerSystem Spec

  5.    #5

    thank you zbook
    ran into some interesting problems downloading iso, for some reason windows 10 Internet explorer would not go to iso down load page:
    Internet explorer would redirect me to:
    witch was asking if i would like to upgrade the operating system
    so i downloaded it with linux (4.1gb iso) .
    now linux will go to:
    but when i try to go to:
    it redirects me to:
    the only thing i can think of is it is picking up the operating system through IE & Firefox
    if it is IE win 10 it tries to update the system if it is Firefox and Linux it lets you down load the iso
    iso is down loading
    witch makes no scene
      My ComputerSystem Spec

  6. Posts : 26,465
    windows 10 professional version 1607 build 14393.969 64 bit

    On a windows 10 PC all of the above links open the same web page.
    See if you can use or borrow any working PC with windows 10 to make a bootable windows 10 iso.
    Maybe a friend's PC or a public library PC?
      My ComputerSystem Spec


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