Windows 8 Pro cannot boot - Error 0xC000021a

Anonymous
2012-11-25T18:10:13+00:00

Hi

I upgraded my son's laptop from Windows 7 to Windows 8 Pro. I has been working fine for a few weeks. But now when booting It halts iwth the error code 0xc000021a. I have tried the following options

Refresh - this fails with the error 0xc000021a

System Restore - this fails with 0xc000021a

Safe mode boot does not work

I can start the cmd console

Any suggestions as to how to proceed?

Windows for home | Previous Windows versions | Performance and system failures

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  1. Anonymous
    2013-01-25T22:50:38+00:00

    How do you do this as my pc is stuck and I cannot get to login

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  2. Anonymous
    2013-01-17T05:40:43+00:00

    Have you installed new program? or changed any setting recently just before this happen?

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    20+ people found this answer helpful.
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  3. Anonymous
    2013-01-17T04:43:04+00:00

    Hello, I am having this problem as well. Been running windows 8 on my desktop without issue for the past few months, and I got this problem all of a sudden.

    In my "C:\Windows\System32\LogFiles\Srt\SrtTrail.txt" file, it says

    "

    Root cause found:

    Bugcheck c000021a. Partameters = 0xfffff8a0052748a0, 0xffffffffc0000428, 0xfffff8a000486d40

    Boot critical file is corrupt.

    Repair action: File repair

    Result: Failed. Error code = 0x2

    Time taken = 5834 ms

    Repair action: System files integrity check and repair

    Result: Failed. Error code = 0x490

    Time taken = 641554 ms

    "

    Any ideas?

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  4. Anonymous
    2013-01-12T09:08:49+00:00

    i had this problem and i fixed it. i faced this after updating my win8 and rebooting after that update.

    to fix this, i tried safe mode but it failed to boot. finally i tried to boot with "force drivers to have signature disabled" and it worked.

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  5. Anonymous
    2013-01-08T18:10:05+00:00

    How big was the memory on the USB? And does it absolutely HAVE to be a USB? I have an external CD/DVD drive. Could I just use a DVD and backup everything on there?

    Thanks.

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