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
    2015-04-27T22:10:32+00:00

    I finally gave up and loaded out an open source OS from the linex line. I chose umbunto because it resembles win7. Most look more like apple.

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  2. Anonymous
    2015-04-27T05:35:20+00:00

    I'm having this problem now and I totally agree, I am now rethinking the mac. I cannot deal with constant system updates that break my computer and force me to spend hours fixing. Its not feasible.

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  3. Anonymous
    2015-04-25T21:35:33+00:00

    Mine shows this image but never restart. 

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  4. Anonymous
    2015-04-12T20:05:20+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.

    This worked for me you will need to follow the instructions as shown here https://learn.sparkfun.com/tutorials/disabling-driver-signature-on-windows-8/disabling-signed-driver-enforcement-on-windows-8  to show you how to do this. After spending better part of 3 hours I found this post. I thought my drive was dead but fortunately I could copy files off it, then I found this post and now my laptop has started up again. THIS DEFINITELY WORKED FOR ME AS WELL.

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  5. Anonymous
    2015-03-17T08:55:47+00:00

    I have tried what AmirOveisi has just said and I it worked for me perfectly, I did it a few minutes ago.

    Thanks AmirOveisi

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