How to Fix System Thread Exception not Handled in Windows 10 (5 Ways)

You can learn why system thread exception not handled in Windows 10 and 5 solutions to fix it as well as how to protect your computer from errors. You can keep reading to know more details.


by Clytze Updated on October 27, 2022

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Why System Thread Exception not Handled in Windows 10?

System_thread_exception_not_handled Blue Screen of Death (BSOD) is a common problem among Windows 10 users. It can happen when Windows starts or when doing any random work. But most of the time, this bug usually appears at boot time, throwing your computer into a restart loop, rendering you unable to use the computer at all.

Cover Picture

Regarding why this error occurs, this article summarizes the following common reasons for you.

  • A driver is not compatible with your version of Windows.
  • There may be a bug in the driver.
  • Windows Update or Automatic Driver Update, as they automatically install new drivers and load them after rebooting.
  • Graphics drivers can be manipulated by malware or installed by mistake.

How to Fix Stop Code System Thread Exception not Handled in Windows 10

So, how can we fix the stop code system thread exception not handled in windows 10? Next, this article will introduce 5 methods in turn to help you restore your system. You can try these methods side by side, and I believe that there is always a method that will help you achieve your goals. You can also learn how to protect your system from the blue screen of death and other problems.

Fix 1. Boot into Safe Mode

The first thing you can try is to boot your computer into safe mode to fix system thread exception not handled in Windows 10. You can decide how to enter safe mode according to your own preferences and whether you can boot the computer into the login screen. Here is an example of entering Safe Mode from Windows Settings, you can follow the steps below.

Step 1. Click on the Start button, then select Settings.

Step 2. Navigate to Update & Security and click on Recovery.

Win 10 Recovery

Step 3. Under Advanced startup, click on Restart now.

Step 4. When your PC restarts the Choose an option screen should appear.

Step 5. You can click Troubleshoot > Advanced options > Startup Settings. Then click on Restart.

Step 6. Select 4 or F4 to start the computer in Safe Mode. If you need to use the Internet, select 5 or F5 for Safe Mode with Networking.

Fix 2. Find the Faulty Driver

Since the “system thread exception not handled on boot” error may be caused by a faulty driver, you can use the Windows log as a troubleshooting tool to locate the faulty drive. You can follow the steps below.

Step 1. Press Win + R to open the Run window and type eventvwr.

Step 2. Navigate to the Windows Logs menu and expand it, then select System.

Event Viewer

Step 3. Look for a log named system_thread_exception_not_handled and click on it to find out which driver is causing the issue.

  • If you get the SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (nvlddmkm.sys) error, Windows 10 displays the blue screen because of an incompatible graphic card driver.
  • If you get the SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (wificlass.sys) error, a wireless driver file is causing the issue.

Fix 3. Rename the Faulty Driver

After finding the filename associated with the system thread exception unhandled error, the user should rename the file. Doing so will cause Windows to create a fresh copy and reinstall. The driver files are located at C:\Windows\System32\drivers. You can rename this file by following the steps below.

Step 1. Press Win + E to open File Explorer and navigate to C:\Windows\System32\drivers.

Step 2. Look for the affected driver. Click on it and press F2. Then replace the filename extension with .old.

Step 3. Hit Enter and restart your computer.

Fix 4. Update, Roll Back, or Reinstall Your Drivers

To fix system thread exception not handled on boot, you may need to update or reinstall the relevant drivers. If the driver has not been updated for a long time, then updating the driver will most likely fix the problem. If the driver has been updated recently, it is best to roll back the driver or reinstall the update. You can do this by pressing Win+X and then selecting Device Manager.

Device Manager

  • Update drivers: You need to browse your device list, right-click on each piece of hardware that has a driver, and select Update it. This includes your disk drives, audio devices, network adapters, sound devices, and display adapters. When you click "Update Driver", you can have it automatically search for the latest updated version.
  • Roll back drivers: Go through your device list, right-click each piece of hardware that has a driver, and select "Properties". Then, navigate to the "Drivers" tab and click the "Rollback" option. Make sure to click "Yes".
  • Reinstall the drivers: You need to uninstall the device first and then navigate to the device manufacturer's website, find your device there, and download the latest driver for that device, then install it manually.

Fix 5. Repair System Files by SFC and DISM

In addition to the previous four methods, you can also use the SFC and DISM that comes with Windows, which are two powerful tools that can help you find and fix almost all system-related errors. Since these command lines will change system files, remember to create a system restore point in advance.

Repair System Files by SFC:

Step 1. In the Start menu search bar, type cmd then right-click on Command Prompt and click run as administrator.

Step 2. Type sfc /scannow and hit Enter to execute the command.


Step 3. Windows will take time to scan and replace corrupt system files. Please wait patiently.

Repair System Files by DISM:

Step 1. Run Command Prompt as Administrator.

Step 2. Type DISM /Online /Cleanup-Image /ScanHealth and press Enter.


Step 3. Wait for Windows to finish scanning. Then type DISM /Online /Cleanup-image /RestoreHealth and press Enter. Windows will repair all the problems that were found during the scan.

Protect Your Computer from Blue Screen of Death and Other Errors

After you fix the system thread exception not handled in Windows 10 on startup problem, in order to avoid troubles caused by blue screen of death or other errors in the future, it is recommended that you back up your system regularly. Not only will this better protect data security, but even if your computer encounters a problem, you can restore it in time using the created system backup.

Free and secure backup software AOMEI Backupper Standard can help you achieve the goal easily. You can set different backup frequencies according to your own needs, and the software will automatically perform the backup task for you.

And when you perform the scheduled backup, the software will choose the incremental backup method to help you improve backup efficiency and save disk space. It also supports backup the system to different destinations in different Windows operating systems. You can download this software and install it, then follow the graphic tutorial below.

Download FreewareWin 11/10/8.1/8/7/XP
Secure Download

Step 1. Open the software and click Backup > System Backup.

System Backup

Step 2. It will select system partition and boot-related partitions automatically. And you just need to select a destination.

Select Destination

Step 3. Click Start Backup to backup the Windows system.

Start Backup


  • Options: You can write comments, choose the compression level for your system backup or set email notifications.
  • Schedule Backup: This feature allows you to set the frequency of your backup, such as Daily, Weekly, Monthly, Event trigger and USB plug in. The professional version supports the last two features.
  • Backup Scheme: You can select different backup methods. And you can upgrade to AOMEI Backupper Professional to enjoy the differential backup method which can easily restore your scheduled backup. After the upgrade, you can also enable automatic backup cleanup feature to save disk space.        


This article describes the reasons for the “system thread exception not handled in Windows 10” error and 5 solutions that you can try in turn to help you fix this error. In order to avoid similar blue screen of death errors or other errors causing system problems, it is recommended that you regularly back up your system with the free backup software AOMEI Backupper Standard.

You can set different backup frequencies, different backup destinations and different backup methods. The system will automatically back up your system for you according to your settings.

In addition, this software also provides functions such as disk backup, file backup and partition backup to help you fully protect your computer security. You can download this software to explore more functions.

Clytze · Editor
Clytze, an editor at AOMEI Technology, is passionate about safeguarding your digital world. She dedicates her expertise to empower users like you in data security and recovery. She firmly believes that everyone should have the tools and knowledge to protect their digital assets through computer backup, seamless disk cloning, and efficient file synchronization. Clytze is your trusted guide on the journey to data safety.