Shulou(Shulou.com)11/24 Report--

CTOnews.com, December 21 (Xinhua)-- Microsoft acknowledges that the KB5021233 update released on Tuesday, the event day of this month's patch, caused 0xc000021a blue screen errors after some Win10 devices were upgraded. Although this problem exists in the Win10 system, some Win11 devices are also affected. If CTOnews.com netizens also encounter this problem, they can follow the tutorial below to see if they can troubleshoot the problem.

Microsoft indicated that the reason for the error may be a mismatch between the version of the hidparse.sys file in c:/windows/ system32 and c:/windows/ system32 / drivers (assuming that Windows is installed on your C: drive), which may cause signature verification to fail during cleaning.

In addition to the above reasons, this specific BSOD error can occur with problem Windows Update updates, corrupted drivers, signature verification failures, or system component problems. Once the device has a 0xc000021a blue screen error, it means that the computer does not start properly.

Repair methods include

Synchronize hidparse.sys version

Restore all pending operations

Run Chkdsk, SFC, and DISM scans

Force driver signing to be disabled

Roll back to the previous version

Perform a system restore

Reset PC

A temporary solution officially provided by Microsoft to synchronize hidparse.sys versions is to copy hidparse.sys files from the system32\ drivers folder to the system32 folder to synchronize hidparse.sys versions through overwriting. The official fixes provided by Microsoft are as follows:

Microsoft also shared a temporary fix:

1. Enter Windows Recovery Environment mode

two。 Select the troubleshooting option

3. Select "Start recovery, troubleshooting, and diagnostic tools"

4. Select Advanced options

5. Select the Command prompt button and you may need to wait for your device to restart if necessary

6. Your device will reboot to a command prompt window and log in with a password

7. Run the following command:

Xcopy C:\ windows\ system32\ drivers\ hidparse.sys C:\ windows\ system32\ hidparse.sys8. When the command is complete, type "exit"

9. Select the continue button

10. It should be normal after reboot.

Note that the "C" disk under the above command is your system disk. If your system disk is not installed on disk C, please change the corresponding drive letter when entering the command.

Restore all pending operations except for the hidparse.sys version out of sync caused by Microsoft's KB5021233 update, sometimes the failure of Windows Update installation may cause Win10 and Win11 systems to fail to start normally, resulting in 0xC000021A blue screen errors.

In this case, it may be helpful to restore all pending operations. To do this, you need to start the command prompt. Enter Windows to restore the environment and start the command prompt from there. You can follow the 1-6 steps above to enter the command line interface, which should display:

X:\ windows\ system32 next you need to enter your system drive letter. For example, if your Windows system is installed on disk C, type "C:" (without ""), or "D:" (without "") if installed on disk D. Then press enter:

C: next you need to enter the "dir" (without "") command:

The dir "dir" command displays a list of all files in the current directory.

Then enter the following command and press enter:

After the dism / image:C:\ / cleanup-image / revertpendingactions operation is completed, the user should see the "The operation completed successfully." reminder

Then the user enters "exit" (without "") and presses enter. This closes the command prompt and takes you back to the Windows RE screen, where you must click the continue option to restart your PC.

Run Chkdsk, SFC, and DISM scans if your device still has a 0xC000021A blue screen error after the above steps, then maybe there is something wrong with your hard disk or the system image file is corrupted. Therefore, we recommend that you repair the disk and system image files.

Start the command prompt in the Windows Recovery Environment interface, as in steps 1-6 above. After opening the command prompt, select the drive on which the Windows operating system is installed.

Then enter

C: # C is your system drive letter chkdsk / f / r. After the above command has been successfully executed, run SFC and DISM scan.

After running all scans on the system, type exit and press Enter. Click continue to restart your computer. You should see the login screen this time. If not, use the next solution.

The technique of forcibly disabling driver signing works for many users. If you still see 0xC000021A blue screen errors, disabling driver force signing will certainly help you. We will introduce this in subsequent articles.

Roll back to the previous version if you can be sure that the blue screen problem is caused by Windows Update, you can roll back to the previous version by uninstalling the update. Enter Windows Recovery Environment and select the "Go back to the previous build" option on the Advanced options screen.

Performing system restore is a useful tool to help users protect and repair their computer software. It is enabled by default on all Windows computers. When enabled, Windows automatically creates different restore points. When a problem occurs, you can select any of these restore points to restore your system to its previous working state.

"go to the Advanced options screen in the Windows recovery environment, and select the system restore option." If you create multiple restore points on your system, Windows will show you all of those restore points and the date they were created.

Reset your PC this is the last option, if none of the above 6 ways have been fixed, then you can choose to reset your computer. However, CTOnews.com recommends that you first reset your computer without deleting the data, and if not, choose to reset your computer completely. Since Xiaobian's computer has been upgraded to Win11, the option to reset this computer on the Win11 platform is posted here, and users can also find the corresponding option in the Win10 system.

CTOnews.com hopes this article will help you resolve 0xC000021A blue screen errors.

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