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 No comments

107 answers

Sort by: Newest
  1. Anonymous
    2016-01-22T04:35:58+00:00

    Y Como se Soluciona?

    tengo mi maquina dando vueltas y vueltas sin poder ingresar 

    no funciona ninguna opcion para repararla 

    que mal

    Was this answer helpful?

    0 comments No comments
  2. Anonymous
    2016-01-11T01:07:22+00:00

    Did it cost ?

    Was this answer helpful?

    0 comments No comments
  3. Anonymous
    2015-11-18T00:54:05+00:00

    How do you do that?

    Was this answer helpful?

    0 comments No comments
  4. Anonymous
    2015-10-20T05:49:42+00:00

    Hi

    I have got similar problem with my Windows 8 Pro  PC. It worked, after 2 years of using win 8 I saw error code 0xc000021a. Then, it showed me: shut down and somerhing like advanced options. I choosed advanced options.

    Safe mode boot doesnt worked. In cmd i tried chkdsk c: /r . I dont know why, it was only idea. Nothing changed... At last I tried the easiest thing. I click on Troubleshoot-> Advanced options-> System restore

    Computer worked right.

    Was this answer helpful?

    0 comments No comments
  5. Anonymous
    2015-10-10T15:06:48+00:00

    A bit late in the day I know but the error was caused by a security update called KB2823324.

    Microsoft released a support article recommending users remove it and the article contains various methods of achieving that goal: https://support.microsoft.com/en-gb/kb/2839011

    The update was subsequently removed from Windows Update and replaced by this one: https://support.microsoft.com/en-gb/kb/2840149

    I hope my contribution here at least goes some way to explain why it occurred.

    As regards Windows 10, users should be aware that all updates are mandatory and will take place regardless of whether a user agrees with them or not. So I think it's only a matter of time before history repeats itself.

    Was this answer helpful?

    0 comments No comments