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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

107 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2017-11-07T17:38:50+00:00

    Same problem

    Was this answer helpful?

    1 person found this answer helpful.
    0 comments
  2. Anonymous
    2015-04-25T21:35:33+00:00

    Mine shows this image but never restart. 

    Was this answer helpful?

    1 person found this answer helpful.
    0 comments
  3. Anonymous
    2014-06-12T09:36:30+00:00

    No need to worry about throwing away yr laptop. This error can be fixed

    Was this answer helpful?

    1 person found this answer helpful.
    0 comments
  4. Anonymous
    2013-09-28T09:16:07+00:00

    This happened to me this morning. Windows update reconfiguration started and now I get this error.

    This is not a new install. I have been running Windows 8 for months.

    This was caused by the latest Windows update!!

    Unfortunately none of the fixes here appear to work either so I have an unusable laptop. As I downloaded Windows 8 upgrade from their website , I do not have a CD to fall back on. Looking forward to a few minutes on the phone to Microsoft now.

    I can here it now; "it is nothing to do with us ..."

    Was this answer helpful?

    1 person found this answer helpful.
    0 comments
  5. Anonymous
    2013-09-23T20:49:47+00:00

    I've been tracking the (0xC000021a) error for almost a year.

    I've checked many...many articles, but no solution came out.

    I reported the error to Microsoft throw a live support session.

    Because I didn't find a solution (yet), I like to share what I know about the problem, so it might help

    someone who's smarter to fix this error.

    I've installed Windows 8 Pro on an 100 different computers, and the error occurred on 3 computers only.

    I reinstalled the same version of Windows 8 Pro that was before on the 3 computers and the error never occurred on 2 of them.

    The error on the third computer kept occurring. The third time it did, I installed Windows 7 on it, and it's working like a charm.

    Microsoft said that this error is probably caused by a third-party program or driver.

    I agree...

    Was this answer helpful?

    1 person found this answer helpful.
    0 comments