Blue Screen of Death Error 0xc000021a


Have you ever received 0xc000021a error while working with your PC? This error occurs due to faults executing essential system ingredients. This article will help you address the same.

Download the Diagnostic

There are certain situations when missing entries in your registry and registry corruption causes this problem. Try running a registry scan to identify if there are any such issues.

  1. Click the button below to download and install the Diagnostic
  2. Perform a Registry scan and fix any problems detected.
  3. Restart your computer.

Estimated Download Time: 10 Seconds

Boot in Safe Mode

Safe Mode is a diagnostic feature that runs your computer in limited functionality and basic features. It makes it easy to identify and diagnose the issue.

1. Click the Start button.

2. Select Settings.

3. Click Update & Security icon.

4. Click the Recovery tab.

5. Click the Restart Now button under Advanced Startup category.

6. Your computer will now reboot. From the new options displayed on your screen, select the Safe Mode with Networking and press ENTER.

Run Check Disk

0xc000021a error and other strange behavior indicate a problem associated with the hard disk. You might want to check the integrity of your disk using Disk Check-Up, a pre-installed tool in Windows.

1. Press Windows Key + X.

2. Select Command Prompt (Admin).

3. Enter the following command:

  • chkdsk C: /f

4. Press ENTER.

Disable Third Party Startups & Services

As Non-Microsoft startups and services muscle into boot interval, there is a magnificent risk of incompatible items. Using the Task Manager program disable all Non-Microsoft items.

1. Press Windows Key + X.

2. Select Task Manager.

3. Click More details.

4. Click the Startup tab and disable all Non-Microsoft items.

5. Click the Services tab and disable all Non- Microsoft items.

6. Exit and reboot your machine.

Uninstall Recent Updates

Review the updates installed through Windows Update, a tool used to download the updates. Though updates come with appearance and security enhancements, sometimes things may get wrong. Uninstall the updates as shown below:

1. Press Windows Key + X.

2. Select Control Panel.

3. Click Programs.

4. Click View installed updates under Programs and Features category.

5. Click the Installed on the column head.

6. Uninstall all recent updates. Right click > Uninstall.


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