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
    2015-02-12T07:38:51+00:00

    Hi, I am using the Win 10 preview 9926.  This particular error has hit several times.  Normally I simply do a normal reboot and it clears itself.  This happens to me with the preview a couple of time a month, sometime more.

    Was this answer helpful?

    0 comments
  2. Anonymous
    2015-01-19T21:13:39+00:00

    Hi Yuri,

    Thanks for this. It worked for me on an HP G70 laptop that had been upgraded from Vista to Win7 to Win8 many months ago and would not start a few days ago after a  Windows update. I tried other suggestions in this forum without success but this did the trick. Thanks again!

    Was this answer helpful?

    0 comments
  3. Anonymous
    2015-01-17T16:39:30+00:00

    Hi..

    how you did it? I have the same situation. How you "force drivers to have signature disabled"?

    thanks.

    Z

    Was this answer helpful?

    0 comments
  4. Anonymous
    2015-01-16T08:23:12+00:00

    Hey Carl

    Actually i don't know any alternative way to boot without driver signature enforcement.

    Buy if you have problems with your tablet's keyboard, try connecting a hardware keyboard to tablet and press boot keys using that.

    I hope it help.

    Good luck

    Was this answer helpful?

    0 comments
  5. Anonymous
    2015-01-15T22:00:01+00:00

    Ok this is the second request because I left something out. I have a tablet and for some reason it does not act on the number or f keys when in the startup settings screen. Can a boot without driver signature enforcement be done any other way? c******@Hotmail.com

    Was this answer helpful?

    0 comments