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How to fix the error in Windows 10 0xc000021a?


The error 0xc000021a means "STATUS_SYSTEM_PROCESS_TERMINATED" –

basically means that Windows encountered an error so deep inside the system that it couldn't keep working.

It appears as BSOD (Blue Screen of Death) when you turn on your system and is usually triggered when updating a Windows 10 PC.

Blue screens of death are a popular Windows item (many people mention the problem starting with Windows 95) – causing a sudden system crash (and a "blue" error screen).

Although insignificant to many people, BSOD actually poses a deep-rooted problem of the Windows system.

Either any element of the software stack, or connecting it to the system device, has caused an error so severe that Windows can no longer continue to function.

The most common BSOD errors occur due to driver issues. This error is caused by a sharp Windows update.

How to fix the error in Windows 10 0xc000021a?


The main causes of error are as follows:

  • Windows Update did not complete properly (but left files in your system)
  • The updated files installed on your PC have not completely rewritten the old ones
  • Your system may have blocked the completion of some installation processes (antivirus, etc.)

As a rule, the following files will be missing:

  • winlogon.exe – responsible for protocol access/logging in Windows 10. If damaged in any way, it will lead to problems such as what you are experiencing
  • csrss.exe – used by Windows to manage the graphical interaction of the system. If it is damaged, corrupted or outdated, the errors encountered will indicate

Since this is a BSOD (otherwise known as a "STOP" error), we need to make sure that we can apply the patches outside the normal Windows operating environment.


This can be achieved using the following steps:


The way to fix the error is to make sure that you have properly repaired all the "startup" files/settings...

1. Run "Start Repair"

The first step is to make sure that you can run an "initial repair" on Windows 10.

Startup repairs are created to provide a clean set of "boot" records – allowing solutions to fix problems while you encounter ...

  • if you box to access your system, you need to restart it in "Initial Repair" mode
  • To do this, you need to click on the "Start" button > "Power" (left "charms") + hold SHIFT and press "Restart"
  • This will bring up "Windows Recovery Environment" (blue screen) which will provide a number of options with the system
  • Click "Troubleshooting" > "Advanced Options" > "Start Repair"
  • This will perform the repair (you will need time) and then restart your system
  • If the problem persists, go to step 2
  • if you cannot access your system (an IE error appears after booting), you need to access "Repair Start" via the "boot force" method
  • Unlike previous versions of Windows, the W10 cannot be republished simply on the "Recovery Environment" screen – it must be prompted
  • The best way to do this is to configure your system 3 times (each time it must fail)
  • For the fourth time, it should display the Recovery Environment screen (blue)
  • In the options that appear, click on "Troubleshooting" > "Advanced Options" > "Start Repair"
  • Let the process happen, and then it should restart your system

2. Troubleshooting BCD, SFC, and DISM

If the above does not work (which will not be the case in 40% of cases), you will have to fix various problems with many essential elements of the Windows system.

To do this, you need to access the CMD – which should be done through the "Windows Recovery Environment" screen that we should have seen in step 1 ...

  • If you have access to Windows, click "Start" > "Power" > hold "SHIFT" + click "Restart"
  • If you don't have access to Windows (an IE error appears at startup), you'll want to boot 3 times – in the fourth it should display the recovery environment screen
  • This will bring up the "Windows Recovery Environment" blue screen, from which you need to click on "Troubleshooting" > "Advanced Options" > "Command Prompt"
  • This will load the black CMD window with which most people need to read about it

From there, you'll want to type in the following commands:

  • "sfc/skannow" + press "Enter"
  • "DISM / Online / Cleanup-Image / RestoreHealth" + press "Enter"
  • "bootrec / rebuildbcd" + press "Enter"

Once you have done that, reboot.

If the error was about Windows startup records, you should see that it has been repaired.


3. Perform the "Repair" installation

Now, Windows 10 doesn't work in the same way as Windows 7/8.

After the day, you were able to perform a "repair installation" – which meant that if you had problems with your system, you would be able to keep all your files, etc. – while Windows would refresh completely. his.

This has been replaced in the W10 by the "Restore Installation" function.

Restoring installations is difficult to use, but it gives you the option to "remove" bad updates from your system – which should fix the blue screen error you're experiencing...

  • If you don't have valid media to install Windows 10 (DVD or USB), you should get one
  • To do this, go to your favorite search engine and search for "Windows 10 Media Creation Tool"
  • Click the Microsoft link and download the tool (not too big)
  • Once you have saved the tool on your system, open it
  • Select "Create installation media for another computer"
  • Choose the appropriate language and system architecture (make sure they are exactly the same as the system you installed)
  • Follow the steps to create media (USB is highly recommended)
  • Restart your system and remove it from USB
  • On the initial setup screen, enter your language and other preferences, then select other
  • Select "Restore your computer"
  • On the "Choose an option" screen, select "Troubleshooting"
  • In the list that appears, click on "Reset this PC"
  • Restoring your system keeps your personal files, but often removes applications and drivers that you may have added to the system
  • In addition to the disadvantages that you need to update these files, you need to get the system back on track.

Of course, this sounds like a lot – as long as you can install the installation if you have access to the system itself, otherwise – the above is the best next process.

At this point – if the error persists, it means that you have other issues that need to be fixed (which may also indicate hardware issues).


This topic was modified 6 months ago by dhtp
Topic starter Posted : 18/08/2022 6:55 pm
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