Fix: System Thread Exception Not Handled on Windows 11

Explore these expertly-made solutions to fix this issue once and for all

by Loredana Harsana
Loredana Harsana
Loredana Harsana
Managing Editor
Loredana is a passionate writer with a keen interest in PC software and technology. She started off writing about mobile phones back when Samsung Galaxy S II was... read more
Reviewed by Vlad Turiceanu
Vlad Turiceanu
Vlad Turiceanu
Passionate about technology, Windows, and everything that has a power button, he spent most of his time developing new skills and learning more about the tech world. Coming... read more
Affiliate Disclosure
  • The Windows 11 error System Thread Exception not Handled indicates an internal system crash and problem related to a faulty driver.
  • The first solution you should try to fix this BSoD error is to boot your computer into Safe Mode.
  • Alternatively, you can reinstall the faulty driver, repair your system files, or follow the other solutions in this guide.
system-thread-exception-not-handled windows 11 error system thread exception not handled
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You’ve probably started your computer and got the Windows 11 error System Thread Exception not Handled on your screen, along with the big sad face bluescreen error. Don’t worry, as we’ve got your back!

Unfortunately, a simple restart of your PC won’t fix the error, but the better solutions aren’t that complicated. Typically, the wrong driver that has been installed on your machine is the source of the blue screen.

Follow along as we will show you what to do to fix the System Thread Exception not Handled error in Windows 11 right after we see in more detail what could have caused it. Keep up with us!


It is necessary to understand what is causing the System Thread Exception Not Handled problem before we can attempt to resolve it because it will be easier for you to fix the problem the next time you face it.

Upon startup, Windows 11 will automatically detect and load all of the essential drivers installed on your machine. However, it is possible that a driver is incompatible with your Windows iteration or that a bug has been introduced into it.

As a result, a blue death screen (BSOD) will appear, stating the error SYSTEM_THREAD_EXCEPTION_NOT_HANDLED on the screen.

The message also sometimes lists the file triggering the System Thread Exception Not Handled error, say, ntfs.sys, nvlddmkm.sys, rtwlanu.sys, or ndis.sys.

Sometimes difficulties appear out of nowhere. For example, your computer is operating normally one day, and the next day it refuses to start.

Here are a few common reasons you face the System Thread Exception not Handled error on your PC.

  • The drivers installed on your PC are outdated – Chances are that you haven’t updated your drivers in quite a while, which triggered this problem.
  • Overclocking can also cause this issue – You might have overclocked your PC for gaming or running graphics-intensive software, which also has been reported to be one of the reasons for this error.
  • You have installed an incompatible driver – If you install an incompatible driver and the error is because of backward incompatibility, i.e., you cannot install 64-bit software on a 32-bit PC.
  • Some critical files of the driver are corrupt or missing – Because of faulty installation or pro-longed usage, some essential files of the driver got corrupted.
  • Important system files are missing or corrupt – Some third-party software might have replaced or tweaked the critical system files, which got corrupted or replaced.

How do I fix the System Thread Exception Not Handled in Windows 11?

In this article

1. Boot into Safe Mode

Using this practical solution with Safe Mode, you can get rid of BSOD issues like System thread exception not handled error on Windows 11.

1. Press the Win + I buttons to open the Settings menu.

2. From the left side, select System.

3. Click on Recovery.


4. Under Advanced startup, select Restart now.


5. Your PC will reboot, and multiple options will appear.

6. Select Troubleshoot.


Expert tip:


Some PC issues are hard to tackle, especially when it comes to missing or corrupted system files and repositories of your Windows.
Be sure to use a dedicated tool, such as Fortect, which will scan and replace your broken files with their fresh versions from its repository.

7. Click on Advanced options.

8. Select Startup Settings.


9. Click on Restart.


10. After your PC reboots, press F5 to boot your PC into Safe Mode.

2. Use a third-party tool

  1. Download Restoro.
  2. Install it on your PC.
  3. Launch the program.
  4. Restoro will scan your PC to detect corrupt or missing system files.
  5. Once the scan is complete, hit the Start Repair button to fix the issues on your PC.

PC problems will inevitably arise, and resolving them isn’t always straightforward. However, specialized tools such as Restoro can assist you in resolving these issues.

It can solve any problem caused by corrupted system files, malware infections, or issues that arise after a Windows upgrade.

Not only this, but it will help you fix errors, including:


Restoro is a fully automated PC repair and optimization software. Use it to repair all sorts of PC problems.
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3. Reinstall the graphics card drivers

  1. Right-click on the Start icon.
  2. Select Device Manager.device-man windows 11 error system thread exception not handled
  3. Now expand the Display adapters section.
  4. Right-click on your GPU and choose Uninstall device. display-adapters windows 11 error system thread exception not handled
  5. Restart your computer.
  6. After restarting, your PC will automatically install the graphics driver.

We can’t stress enough how vital updating your drivers are, given these can trigger System Thread Exception Not Handled in Windows 11 on startup. Thus we recommend DriverFix, a specialized tool that automatically updates and fixes them for you.

4. Repair your system files

  1. Open the Start menu.
  2. Type in cmd and choose Run as administrator.cmd-search windows 11 error system thread exception not handled
  3. Type or paste the following command inside the CMD window and press Enter: sfc /scannowsfc-scannow windows 11 error system thread exception not handled

5. Use a Windows Restore Point

  1. Open the Start menu.
  2. Search for Create a restore point and open it. create-a-restore-point windows 11 error system thread exception not handled
  3. Click on the System Restore button.system-restore-button windows 11 error system thread exception not handled
  4. Click on Next.
  5. Select the restore point to undo the latest changes to your computer. restore-point windows 11 error system thread exception not handled

For more information on Windows system restore points, check out our article on creating a Windows 11 restore point.

Alternatively, if you’ve made a mistake you want to delete from your past, we’ve got you covered with a guide on undoing a system restore in Windows 11.

And lastly, since we are on the same subject, we suggest you read our post on how to fix System Thread Exception not Handled ntfs.sys in Windows 10 since it includes solutions applicable to Windows 11.

Can the Blue Screen of Death Be Fixed?

Are you getting the BSoD or Blue Screen of Death issue on your Windows 11 PC, and none of the solutions seems to resolve the problem for you? Then do not worry, as we have got you covered.

You can check out our dedicated guide that lists effective solutions to fix the Blue Screen of Death error on Windows 11.

Was this guide helpful for you and your friends? Then, do tell us in the comments section below whether you have more solutions in mind.

Still experiencing issues?


If the above suggestions have not solved your problem, your computer may experience more severe Windows troubles. We suggest choosing an all-in-one solution like Fortect to fix problems efficiently. After installation, just click the View&Fix button and then press Start Repair.

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