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
    2014-09-26T06:37:21+00:00

    I have a Toshiba laptop and nothing happens when I push f8 or f5. I can't get to the recovery console either, turning it on and off three times was not only pointless but aggravating. Does anyone know if this is strictly a windows 8.1 problem? Does it happen with windows 7?

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  2. Anonymous
    2014-09-30T10:55:46+00:00

    No. Took me three tries to get the syntax right,but it worked and nothing was lost.

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  3. Anonymous
    2014-09-30T10:57:36+00:00

    Thank you.

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  4. Anonymous
    2014-12-26T16:21:57+00:00

    The given link --- http://www.regmender.com/how-to-fix-windows-8-error-0xc000021a.html --- does not seem operative.

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  5. Anonymous
    2014-12-26T16:47:12+00:00

    F8 does not do anything. Is there anyway to fix from command prompt?

    What is your PC's brand? 

    Maybe in your PC you should use other key instead of F8 to show the menu i mentioned in my answer.

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