How to Fix Stop Code System Thread Exception Not Handled in Windows 11

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!

What does SYSTEM_THREAD_EXCEPTION_NOT_HANDLED mean?

Before we can attempt to remedy the System Thread Exception Not Handled problem, we must first understand what is causing it. This will make it easier for you to correct the problem the next time it occurs.

Upon startup, Windows 11 automatically loads essential drivers. However, compatibility issues or bugs in a driver may lead to the dreaded blue screen of death (BSOD) with the error SYSTEM_THREAD_EXCEPTION_NOT_HANDLED.

The error message may identify the file triggering the problem, such as ntfs.sys, nvlddmkm.sys, rtwlanu.sys, or ndis.sys.

System Thread Exception Not Handled errors can seemingly appear out of nowhere. Here are some common reasons why you might encounter this issue:

• Your computer's drivers are out of date: Most likely, you haven't updated your drivers in a long time, which is what caused this issue.

• Overclocking can also create this problem: You may have overclocked your PC for gaming or running graphics-intensive software, which has also been cited as a cause of this error.

• You have an incompatible driver installed: If you install an incompatible driver and the issue is due to backward incompatibility, you will be unable to install 64-bit software on a 32-bit PC.

• Certain vital driver files are corrupted or missing: As a result of poor installation or prolonged use, certain critical driver files are corrupted.

• Important system files are missing or corrupt: Some third-party applications may have altered or modified the crucial system files that were damaged or replaced.

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

After we explored possible reasons, now, let's see how to fix error  system_thread_exception_not_handled in Windows 11.

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.

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

Step 2. From the left side, select System.

Step 3. Click on Recovery.

Step 4. Under Advanced startup, select Restart now.

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

Step 6. Select Troubleshoot.

Step 7. Click on Advanced options.

Step 8. Select Startup Settings.

Step 9. Click on Restart.

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

2. Reinstall the graphics card drivers

Step 1. Right-click on the Start icon.

Step 2. Select Device Manager.

Step 3. Now expand the Display adapters section.

Step 4. Right-click on your GPU and choose Uninstall device.

Step 5. Restart your computer.

Step 6. After restarting, your PC will automatically install the graphics driver

3. Scan and repair disk

You can use a third-party utility to address the file system issue; because your PC cannot operate normally, you need a tool that can boot before your PC boots. We propose AOMEI Partition Assistant Professional, a disk and partition manager, in this case.

This utility supports Windows 11/10/8/8.1/7/XP, and it can make a bootable DVD with this software pre-installed. Once you boot into it, you can use this tool to scan and repair your disks, and if all problems are successfully resolved, you may remove it to boot into your system.

AOMEI Partition Assistant

The Best Windows Disk Partition Manager and PC Optimizer

Free Download
Windows 11/10/8.1/8/7

First, please prepare an empty USB for the task. Plug it into a running Windows PC.

Step 1. Install and start AOMEI Partition Assistant. Click Make Bootable Media under Tools menu.

Step 2. Click the USB Boot Device to select your USB drive as the path to store the ISO file, and click Proceed.

Step 3. Click “Yes” in the pop-up window, and wait for the process completes.

When the process is done, connect the bootable USB drive to the computer with the boot issue, and change the boot order to boot from the bootable USB stick.

▶ Option 1. Check Partition

You can check your C drive or D drive with this tool.

Step 1. Right-click the partition you want to check, select “Advanced” and go to the “Check Partition” option.

Step 2. Tick one of the check options and click “OK”.

Step 3. In the window, click “Yes” to restart now and wait for the final result.

▶ Option 2. Surface test

You can check the system disk.

Step 1. Open AOMEI Partition Assistant. Right-click the disk you want to scan, then click Disk surface Test under Test menu. It will mostly check the bad sectors of the selected disk.

Step 2. Click Start to do the surface test. You may want to tick Quick Check to perform a fast test.

4. Repair your system files

Step 1. Open the Start menu.

Step 2. Type in cmd and choose Run as administrator.

Step 3. Type or paste the following command inside the CMD window and press Enter: sfc /scannow

Further reading: Can the Blue Screen of Death Be Fixed?

The "system thread exception not handled" error is one of the causes of BSOD on Windows system. So, you can also try different solutions to fix system error.

Conclusion

In conclusion, navigating system thread exception not handled in Windows 11 requires a blend of preventive measures, troubleshooting techniques, and user experiences. By following the insights shared in this article, you can efficiently tackle this error and enjoy a seamless computing experience.

Besides scanning and repairing disk and system, this handy tool also has disk cloning function. You can clone your main disk to another disk for disk backup to avoid data loss in any accidental crash.

FAQs about Windows 11 system thread exception not handled error

Is System Thread Exception Not Handled Fatal?
No, system thread exception not handled is usually a fixable error. Explore solutions to address this issue without compromising your system's integrity.

How Often Does Windows 11 System Thread Exception Occur?
The frequency of system thread exception not handled varies. Learn about common scenarios and factors that contribute to its occurrence.

Can Outdated Drivers Cause Stop Code System Thread Exception Not Handled?
Yes, outdated drivers are a common trigger. Find out how keeping drivers updated can prevent the stop code system thread exception not handled.

Is Upgrading to Windows 11 Worth It?
Upgrading to Windows 11 offers various benefits, including resolving system thread exception not handled. Discover why making the switch can be advantageous.

What Role Does Antivirus Software Play in System Thread Exception Not Handled?
Antivirus software can impact system thread exception not handled. Understand its role and how to configure antivirus settings for optimal performance.