Repair error c000021a

Fatal error c000021a is a type of Windows stop error, also known as BSoD error (Blue Screen of Death). When this error occurs, the computer screen turns blue and the user is locked out of the current activity.

This error code is fatal and can cause serious problems like system crashes and freezes.

The error code is usually displayed in the following format:

STOP: c000021a

The system process of the Windows logon process was terminated unexpectedly with the status 0xc0000034 (0x000000 0x0000000).


Image of the recovery box

Error causes

Fatal error c000021a occurs when the Windows kernel detects that the service processes Winlogon.exe or csrss.exe stopped responding or failed to load. In this case, the error code appears on the screen.

However, this is not the only reason why this error occurs. There are many other reasons why the fatal error c000021a appears on your computer screen. These include:

  • Missing or damaged hardware drivers
  • Faulty hardware
  • Windows System Restore failed during the rollback process
  • Malware or virus infection
  • Registration problems

Whatever the reason, it is advisable to fix the error immediately and without delays. Remember that this is a serious error that can cause a lot of damage to your PC.

More information and manual repair

Serious error c000021a is a serious PC problem. However, this does not mean that you need to hire an expert to fix the problem. The good news is that this error is actually quite easy to fix.

You do not need to be a technical expert or computer programmer to fix the c000021a fatal error on your PC.

Here are some do-it-yourself methods to fix this error code immediately without any problems:

Let’s get started:

Method 1: Update your PC drivers

As mentioned earlier, corrupted or missing drivers can be one of the many reasons for this error to occur. So check the drivers first. Run a driver scan and make sure that all drivers are updated.

Method 2: Run Windows System Restore

To do this, first launch the Task Manager by pressing CTRL + SHIFT + ESC on your keyboard. Now click on the "Application" tab and then click on "New task.

Then go to the folder C:\Windows\System32\Restore and double click on the file rstrui.exe. This helps to start the system recovery. Your computer will be restarted during the process and hopefully the error will be fixed.

However, if the error persists, try methods 3 and 4.

Method 3: Scan for viruses

Sometimes a serious error c000021a can also occur Malware infection. Your PC may be affected by viruses hidden in various places without you knowing about it.

Therefore, to fix this error, it is recommended to run an antivirus program and scan for viruses. If it is detected, remove it immediately to fix the error code.

Method 4: Repair the registry

Another method to fix the fatal error code c000021a on your system is: repair the registry. In the registry all the information and activities performed on the system are stored.

If not cleaned up frequently, too many unnecessary and obsolete files such as junk files, cookies, internet log and temporary files will be loaded, corrupting and damaging the registry, generating a bluescreen with death error codes such as Fatal Error c000021a.

Although you can repair the registry manually, this can be both time-consuming and somewhat difficult, especially if you are not a computer programmer. Therefore, it is advisable to download a registry cleaner to fix the problem immediately.

Automatic repair with Restoro.

Regardless of whether the code Fatal Error c000021a occurs due to a virus infection or registration problems, download Restoro. This is an advanced and next-generation multifunctional PC fixer. This software comes with several utilities like a powerful registry cleaner, antivirus, system optimizer and more.

The registry cleaner scans the entire PC and detects all kinds of registry problems at once. It cleans up the registry, deletes all unnecessary files and restores the registry.

At the same time, the antivirus embedded in this software detects all types of viruses, including malware, adware, spyware and Trojans, and removes them in seconds.

The system optimization feature ensures that your PC’s speed and performance are not affected during the repair process. It ensures that your PC is working at optimal speed.

Restoro is a complete solution for all your PC needs. It has a user-friendly interface that makes it easy for users of all levels to work. It is compatible with all versions of Windows

Learn more to download Restoro and fix Fatal Error c000021a code on your PC today!

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