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Quick Fix for Windows Stop Code 0xc000021a on Windows 10
If you encounter the Windows stop code 0xc000021a on Windows 10, you can refer to this article for solution.
By Yuka Updated on January 4, 2023
User Case: 0xc000021a Stop Code
“Hello. I have read everything about my situation and I know that there is no way to fix it without redownloading Windows 10 to my computer. I don't have access to any computers running Windows 10. So, is there any way to fix it other than that?
- Question from Microsoft Community
Several Windows users have posted queries on Reddit and Microsoft forums related to the 0xc000021a stop code. Some said the error code occurred after installing Windows Update, while others said it appeared out of the blue while working on their systems.
What Is Windows Stop Code 0xc000021a?
After installing KB5021233, some Windows devices might start up to an error (0xc000021a) with a blue screen. The 0xc000021a error is one of the many blue screen of death errors that affect all versions of the Windows operating system. No worries! You can fix it by trying the methods shared in this blog. However, before that, let's first understand the bug and its cause.
Most users who encounter Windows error code 0xc000021a are upgrading or have just upgraded to a newer version of Windows. Due to the BSOD 0xc000021a issue, users are unable to boot their computers properly. After installing KB5021233, there might be a mismatch between the file versions of hidparse.sys in c:/windows/system32 and c:/windows/system32/drivers (assuming Windows is installed to your C: drive), which might cause signature validation to fail when cleanup occurs.
Below you will also find a list of some other causes that may lead to Windows error 0xc000021a and other important system errors.
- Misconfigured Windows registry entries
- Corrupt system files
- Misconfigured driver signature enforcement feature settings
- Missing important Windows files in the Windows installation media
- Incompatible software programs installed on the system
Troubleshooting Method to Fix the Stop Code 0xc000021a Error
Windows 10 Blue Screen stop code 0xc000021a prevents you from entering the system. If you wish to re-enter your computer without installing a new copy of Windows, we will work on the fix in Safe Mode. Safe Mode of the operating system is a troubleshooting mode that can be used on a computer.
- Restart your computer, once you see the Windows logo on the screen, restart again and repeat this step three times.
- Wait for the system to boot and go to the Windows boot menu. Click Troubleshooting -> Advanced Options -> Startup Settings and click the Restart button.
- After your PC restarts, you’ll see a list of options. Select 6 or F6 to start your PC in Safe Mode with Command Prompt.
- Your device should reboot to a Command Prompt window. You may need to log in to your device with your password before entering the Command Prompt window.
- Run the following command (Important: If Windows is not installed to C:\windows you will need to modify the command to your environment):
- xcopy C:\windows\system32\drivers\hidparse.sys C:\windows\system32\hidparse.sys
- Once the previous command completes, type: exit.
- Select the "Continue" button.
- Windows should now start up as expected.
✨ Note: It is not recommended to follow any other workaround than those recommended above. We do not recommend deleting the hidparse.sys from your Windows\System32 folder.
Back Up Your Windows 10 Computer Before Performing the Upgrade
From the feedback of forum users, many of them will encounter various problems after releasing new Windows updates. The Windows 10 Blue Screen stop code 0xc000021a in the article is just one of them. There are some problems that are well solved, but some very serious ones can cause a black screen or blue screen on your computer, such as download error - 0x800f0806 in Windows 22H2 update, so that you can't successfully start your computer.
To avoid encountering similar situations in future upgrades, it is recommended that you back up your Windows 10 computer before upgrading. Also, you can create a bootable media in advance. This way, if you encounter similar system problems next time, you can quickly restore your computer to a normal state with the help of this bootable media and system backup.
AOMEI Backupper Standard is a free backup and restore tool that you can use to easily create a Windows 10 system backup and bootable media. It has very easy steps to follow, so even a computer novice can get started quickly. You can refer to the illustrated steps below to see how to use it.
Step 1. Open the software and click Backup > System Backup.
Step 2. It will select system partition and boot-related partitions automatically. And you just need to select a destination.
Step 3. Click Start Backup to backup the Windows 10 system.
✨ Notes:
🎍 Options: You can write comments, compress or split an image file and enable email notifications.
🎍 Schedule Backup: It can run the backup task automatically at fixed intervals, such as Daily, Weekly, Monthly, Event trigger, and USB plug in. The last two are available in the Pro version.
🎍 Backup Scheme: It provides 3 backup methods (Full/Incremental/Differential). And the differential backup method are easier to restore, you can upgrade to the Professional or higher versions to enjoy it. After the upgrade, you can also enable the automatic backup cleanup feature to save disk space.
Final Words
This article explains what this Windows stop code 0xc000021a on Windows 10error is, what is the way to deal with it, and how to avoid the risk of similar Windows Update errors. Using the free professional backup software AOMEI Backupper Standard to backup your system regularly is a good preventive method. Not only does it help you to be well protected against the risk of data loss, it also allows you to quickly restore a previously created system backup in case you encounter a blue screen error.
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