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: Newest
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
    2017-08-03T08:56:56+00:00

    Hi! i have the same problem with my PC... Do u have any idea how to fix this?? or Resetting the PC is the only way?

    Was this answer helpful?

    0 comments
  3. Anonymous
    2017-07-19T02:21:02+00:00

    Frustrating night, just want to know why my original OS disk was not working, and a new out of the box OS disk is not accepting data. 

    Messages have been:

    Oxc0000001

    Oxc000021a

    Oxc0000098

    And I guess I have to ask a question before MicroSoft will let me see answers.

    Confused

    Was this answer helpful?

    0 comments
  4. Anonymous
    2016-12-11T06:54:04+00:00

    bluescreen message  YourPCdid not start correctly    Oxc000021a  .  i hace HP All in one PC,,  ccame with win 8 and free upgrade Win 10.

    i do not have any disks all downloaded from Microsoft.  How can I fix this?

    Was this answer helpful?

    0 comments
  5. Anonymous
    2016-09-13T15:03:02+00:00

    Surface is really a piece of junk! There is always problem signing in. Works for a while then all of sudden yo can't sign in. Error 0xc000021a or whatever it was is an example. Then there is answers on how to fix this problem but the explanation is only for people who knows computerese not for the general public who need to use their computer without knowledge of the technical working of a computer. So how do you fix this problem. If you can't sign in you can't do anything. I should have not have to be a computer  nerd to sign into my computer.

    Was this answer helpful?

    0 comments