KB5021233 Security Update Crashes Windows 10 With 0xc000021a BSOD

0xc000021a error is the Windows 10 December 2022 update. To fix it, follow the procedures below. 1. Try to boot your PC several times until you enter the Windows recovery environment

2. From the listed options, choose Troubleshoot button

3. Click on start recovery, troubleshooting, and diagnostic tool

4. In the following window, choose advanced options, then select Command Prompt Wait for the system to reboot automatically

5.  A command prompt window s will appear after signing in using your administrator password

6. Now, type and run the following command in the command prompt window