Windows 10: Can't boot. Is error 0xc000021a unsolvable?

Discus and support Can't boot. Is error 0xc000021a unsolvable? in Windows 10 Support to solve the problem; Hi I upgraded from Windows 7 to Windows 10 and it was working fine for a few days but now whenever I try to boot it up I get BSOD with error code... Discussion in 'Windows 10 Support' started by 0xc000021a, Aug 8, 2015.

  1. Can't boot. Is error 0xc000021a unsolvable?


    Hi


    I upgraded from Windows 7 to Windows 10 and it was working fine for a few days but now whenever I try to boot it up I get BSOD with error code .


    I've tried the following 'fixes':


    System restore --- Runs for a few minutes and then says "Could not restore your computer. No changes were made"


    Clicking on any of the advanced startup options --- BSOD


    Reinstalling windows 10 with a usb --- Results in it going into circles with this messagea "The computer started using the Windows installation media. Remove the installation medial and restart your computer so that Windows starts normally. Then, insert the installation media and restart the upgrade. [Do not select iCustom [advanced]I to perform an upgrade. iCustom [advanced]I installs a new copy of Windows and deletes your programs and settings.)"


    I've taken the usb out and restarted the computer several times, even called Microsoft Technical Support. They had no idea what to do.


    I used to be able to access the command prompt and I tried everything suggested in this article here Fix for Windows XP, Vista, 7, 8, 8.1. The reason I say "used to" is because things recently got alot worse when I changed the boot order and now it just turns black after the bios screen. I've tried to restore the BIOS setup to default settings and I also tried everything suggested in this article 3 Ways to Reset Your BIOS - wikiHow but nothing works.


    To recap, it all started 2 days after I installed windows 10. Everytime I tried to boot I got BSOD with error code . I tried everything and nothing worked. Then I changed the boot order in BIOS setup and now it just turns pitch black after the BIOS screen, so I can't really do anything anymore.


    I've called microsoft support and spammed forums for 4 days now and no one has been able to help me.

    :)
     
    0xc000021a, Aug 8, 2015
    #1

  2. Error code 0x80070005

    This sounds like it may work for someone that can boot into their desktop. I can't and I am using a USB to boot into recovery. Additionally, sfc won't work and gives an error message. I also get error codes 0xc000021a and 0xc0000001a at startup saying
    I can't boot. I can't get to safe mode, only one of the two error messages.
    Ran bootrec /scanos, and bootrec claims that I have 0 Windows installions on the machine. What now?
     
    Anthony A55, Aug 8, 2015
    #2
  3. Clean Install of Windows 10 from USB giving me error code 0xc000021a before install

    So I tried updating from the original ISO and it gives me the 0xc000021a error after it restarts for the first time during installation. I reinstalled a fresh copy of Windows 8.1
    thinking maybe a startup file was corrupted. But after the new 8.1 install, it is still giving me the same 0xc000021a error. Then,
    when it boots back up after the error, it says "0xC1900101 - 0x20017, the installation failed in the SAFE_OS phase with an error during BOOT operation".
     
    Dustin Reynolds, Aug 8, 2015
    #3
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Can't boot. Is error 0xc000021a unsolvable?

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