How Can I Fix Fatal System Errors On Windows 10?

Fatal system error on Windows 10 is the trickiest Blue Screen of Death stop code error message. This confuses that user thereby making it difficult to decide which solution to apply.

Stop Error 0xc000021a is one dangerous, fatal error that leaves your system dysfunctional; therefore, fixing it quickly is recommended. But before that, let’s understand what a fatal system error message is.

What is a Fatal System Error?

Fatal system error is commonly referred to as a system crash, stop error, or kernel error. It occurs when the operating system cannot function safely. In simple words, the Blue Screen of Death appears to protect your Windows from further damage.

How To Fix Fatal System Errors On Windows 10?

Fatal system error interferes with our work and can crash the system anytime. Therefore, fixing it is important. Follow these workable solutions one by one to fix computer error.

1. Use DISM command

When Windows 10 installation gets corrupted or is damaged, you can use the DSIM command to fix it.

To do so, follow the steps below:

  1. Use Windows 10 installation media to boot PC
  2. Now, open Command Prompt by pressing the Shift + F10 function key.
  3. Here type the following command:
    • dism /image:c: /cleanup-image /revertpendingactions and press Enter.
  4. Wait for the process to finish should solve the stop code error message.

2. Disable driver signature enforcement

Another workable solution to fix fatal system error BSOD on Windows 10 is to disable driver signature enforcement.

Driver Signature Enforcement is a Microsoft security feature that tests the driver to see whether it is working correctly or not in the operating system.

This feature can also be the reason behind the Windows 10 system error. Therefore, it is suggested to disable/turn it off and see if it helps in fixing the issue or not.

Apply the below-given steps:

To do so, follow the steps mentioned below:

  1. Restart your Windows 10 PC during boot time to get the Automatic Repair window.
  2. Once you are there, select Troubleshoot > Advanced options > Startup Settings.
  3. Now to Disable driver signature enforcement press F7.

This will disable driver signature enforcement. Now check if kernel error on Windows 10 is resolved or not.

3. Replace the corrupted files

Often due to corrupted system files, users encounter Fatal system error. Therefore, to fix it, you will need to copy and paste Winlogon, Userinit.exe, and msgina.dll from a different Windows 10 PC to the one you are facing a problem with.

These files are saved in the WindowsSystem32 directory. Copy them and paste it to the computer you are facing. Before copy-pasting the files check Windows 10 version. It should be the same if you copy 64-bit version files into 32-bit version Windows you will face problems.

4. Repair your registry

Sometimes by repairing the invalid and corrupt registry, you can fix the error message. For this, you can use a tool like Advanced System Optimizer that offers registry cleaner.


However, if you want to do it on your own; below are the steps.

Note: We do not recommend making changes to the registry as this might harm your system.

  1. Press Windows + R keys
  2. In Run window copy-paste: C:\Windows\System32\config
  3. Once there, copy DEFAULT, SAM, SECURITY, SOFTWARE, and SYSTEM files to a different location for safety purposes.
    fatal system errors
  4. Again, open Run window and copy-paste C:\Windows\System32\config\RegBack press enter.
  5. From here copy DEFAULT, SAM, SECURITY, SOFTWARE and SYSTEM files to C:\Windows\System32\config\

fatal system errors


This should help fix the issue. However, if you are unable to boot normally into Windows 10, try booting in Safe Mode and then follow the above steps.

5. Run SFC scan

Designed to repair corrupted files, the SFC scan helps get rid of fatal system errors. To run the SFC scan, follow the steps below:

  1. Type Command Prompt in Windows search
  2. From the search result select and click Run as administrator from the right
  3. Type sfc/scannowand hit the enter keyfatal system errors
  4. Wait for the process to finish.

This should fix the stop code error message.

6. Rollback or update drivers

Sometimes Fatal system errors occur due to updating incorrect drivers. Therefore, we will need to Roll Back updated drivers.

To avoid such situations, you can use a driver updating software that knows which driver to update. Not only this, but you can also even take a backup of an old driver before updating them and use either the trial or Pro version.

Benefits don’t end here, Systweak even offers a 60-day money-back guarantee this means if you are unhappy with the purchase can return within 60-days of purchase.

How to Roll Back Driver Manually on Windows 10?

In Windows search, type Device Manager.

Choose the search result and press enter.

Look for the driver you just updated.

Select it > right click > Properties > Driver tab > Roll Back Driver

fatal system errors

If the Roll Back Driver button is greyed out click uninstall.

This might fix the issue.

Now download the updated version of the driver manually or can use Smart Driver Care for it.

7. Run chkdsk

CHKDSK (check disk) is another workable solution to fix fatal system errors.

To use it, run Command Prompt as administrator and type enter chkdsk /r C: press the enter key.

Wait for the process to finish.

To run a scan on all partitions, make sure to replace C with the other driver letters. Now run Windows you should not face the Blue Screen of Death.

8. Reset Windows 10

If nothing works try resetting Windows. To do so, restart the computer during boot time until you get Automatic Repair and then follow steps explained below:

  1. Select Troubleshoot > Reset this PC > Remove everything.
  2. When asked insert the installation media
  3. Hit Only the drive where Windows is installed > remove my files option
  4. Click the Reset. This will start the process.

If this too doesn’t help, then you will have to do a fresh Windows install.

Note: Both these steps will delete all data so before doing them make sure you have the backup of all critical files.

Using the above steps, you will surely be able to fix fatal system error, an error that makes the OS inoperable. Sometimes due to hardware also you can face this problem; therefore, check the motherboard if it is faulty or corrupt replace it to avoid facing this error message in the future.

We hope you found the guide informative and useful. If that is true, share it with others to help. If not share your feedback in the box below.


  • comment_avtar
    Jesus Casanova
    I got an error message “error:PDP_DETECTED_FATAL_ERROR” on my screen. The computer then went rebooting with power on and off and nothing happens. No screen either. There is power and the fans just keep going on and off. The computer is not connected to the internet. I cannot find a PDP error, only PNP. Is the motherboard fried?

    3 years ago

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