How to fix error 0xc000021a on windows 10?

Grame Smith 6 Reputation points

My windows 10 pro pc stopped booting 2 days ago. It goes into the repair/diagnosing loop and an error of 0xc000021a. I went thru all the advanced options to repair it and the screen to disable options and that stuff but this has me worried.

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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  1. Michal Barták 231 Reputation points


    first of all, wrong section.

    Secondly, such BSOD usually happens after recent windows updates. If you are able to boot to advanced recovery, there is an option to uninstall recent cumulative or feature update. In most cases this helps.

    If it helps in your case, most likely it will happen again. Of course I would make a clean install of latest build.

    Also by a quick search, there are some occurrences where "Disable Driver Signature Enforcement" helped as described in your article.

    P.S. Please change the tag of this question to a correct one.


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  2. Dale Kudusi 3,226 Reputation points

    You could try booting your computer into Safe Mode, navigate to Control Panel, find out and uninstall the recently installed software.

    Also, you could follow this instruction for more detailed step-by-step solutions:

    Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information


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