Get Rid Of Installation Error: 0xc000021a On Windows 10

Ever since Microsoft has started pushing updates for Windows 10, several issues were solved, while numerous are still there. Error Code 0xc000021a is one of those annoying issues that gets triggered when winlogon.exe or csrss.exe stops working. As the name of the file indicates, the files are responsible for the login/logout operations inside Windows. So, in case any of the mandatory files are compromised due to:

  • Other corrupted system files.
  • A failed upgrade.
  • Incomplete installation of a software

Will result in Stop Code 0xc000021a. It’s a platform-independent issue & occurs only on the latest Windows 10. Aside from these issues, the BSoD error can also occur because of:


  1. Misconfigured Drivers
  2. Damaged System Files
  3. Third-party Utility Hindrance
  4. WinLogon or Client Server-Run Time Subsystem (CSRSS) CorruptionError Code 0xc000021a

Solutions: Best Fixes To Resolve Stop Code 0xc000021a

Try the following workarounds to fix the Stop Code 0xc000021a on your Windows PC.

Workaround 1: Booting Windows Without Driver Signature Enforcement Feature

Booting into Safe Mode is a great way to troubleshoot various Windows errors. In this BSoD error, you can try booting your OS with the disabled Driver Signature Enforcement feature. The functionality is a security measure designed to prevent device drivers that are not digitally signed to run on Windows. That being said, sometimes it can hinder in the process and lead to error 0xc000021a:

Step 1- Press the Windows key on the Start Menu > Press Hold & Shift button, and click on the Power icon.

Step 2- Choose the Restart option. This should let you boot into the Recovery options menu. Once you get there, follow the below-mentioned path:

Troubleshoot > Advanced Options > Startup Settings > Restart

Step 3- As soon as your PC restarts, press the F7 key & select Disable Driver Signature Enforcement feature.

This would help you to access several other features on your system & also fix this particular BSOD error on your system.

Best Fixes To Resolve Stop Code 0xc000021a

Workaround 2:  Perform Startup Repair

To perform this method, you need to use Windows 10 installation CD again. So, once you boot the CD, start following the steps mentioned below:

  • Go to Troubleshoot > Advanced options > Startup Repair
  • The Startup Repair will start looking for all the issues and would repair everything automatically

Workaround 3: Checking The Health OF Your HDD

In most of the cases, the above two methods would resolve your issue. But in case, the Stop Code 0xc000021a is still occurring on your PC. We recommend you running a diagnostic test to detect bad sectors or damages. Windows 10 features a built-in utility for the purpose, so you can check the HDD problems, and fix everything in one place.

Follow the instructions below to check the health of your HDD:

Step 1- Press Windows + E on your keyboard to launch File Explorer.

Step 2- Right-click on the System Partition & choose Properties.

Step 3- In the Properties window > Tools > Under Error Checking Section > Click on Check button

Let the Windows 10 built-in utility scan all the HDD issues for you. The feature would automatically fix all the issues as well if found any!

Checking The Health OF Your HDD

Workaround 4: Run System Restore

This method would help you to get back into the Windows state where everything was working aptly. To perform System Restore on your Windows 10, follow this guide carefully.

Workaround 5: Try Running DISM Scan

For users unaware, DISM Scan is similar to SFC Scan (System File Checker Scan) a built-in Windows utility designed to detect and fix missing or corrupted files. You can run a DISM Scan to try fixing this BSOD error, To do so:

Step 1-  Launch Command Prompt and run it as an Administrator.

Step 2- Execute the command: DISM/Online/Cleanup-Image /RestoreHealth

Press Enter to run the command!

The DISM Scan will start scanning common Windows issues & would also automatically fix to get everything working in one place. Once the scan is completed, observe if the Stop Code 0xc000021a error occurs again!

Can you think of any other methods to fix the Error 0xc000021a on your Windows 10? If yes, do not hesitate to share those fixes with us in the comment section below!

Leave a Reply

Your email address will not be published. Required fields are marked *

Subscribe Now & Never Miss The Latest Tech Updates!

Enter your e-mail address and click the Subscribe button to receive great content and coupon codes for amazing discounts.

Don't Miss Out. Complete the subscription Now.