Stop Code: System Thread Exception Not Handled on Windows 10 – Working Fixes

The system thread exception not handled error message, also called the Blue Screen of Death (BSOD) is commonly encountered by Windows 10 users. It can either happen when you are booting up your system or during other activities.  Wondering what this error message means?

In simple terms, when the system thread exception not handled error pops up, it is an indication that a system thread generated an exception that an error handler failed to catch. As a result, your system’s way of putting up red flags against the exception is this error message. In a way, it is shutting itself down to avoid further damage. Well, kudos! But, this error message might cause your PC to continue rebooting in an endless loop which can be very frustrating.

Stop Code: System Thread Exception Not Handled on Windows 10 – Why it Happens

  • Outdated drivers
  • Incompatible drivers
  • Bad programs

If you are fortunate enough, the error message might be accompanied by a particular file name. The file name attached to this error code is often the one with the problem. It indicates which graphic driver is causing the issue and makes it easier to fix. All you will have to do is update or reinstall that driver.

If though, the error message isn’t accompanied by any file name, you might have to update or reinstall all drivers on your system.

How to Fix the System Thread Exception Not Handled Issue

Break Reboot Loop

First, the reboot loop caused by this error must be broken. You will have to boot into Safe Mode. Since you can’t access Windows Settings, you will have to boot into winRE (Windows Recovery Environment). To do this, follow the steps below:

  • Press your PC’s power button until it turns off.
  • Press the power button again to turn it on
  • As soon as it shows any sign of Windows starting, repeat the two processes above again. Do this continuously until you enter winRE, that is until it displays various recovery options.
  • In the options displayed, go to Troubleshoot >> Advanced options >> Startup settings >> Restart. On restarting, you will see a list of options. Press the F5 key to Enable Safe Mode with Networking

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After this, you can try to identify where the error message is generated from using Event Viewer. Only do this when the blue screen error message doesn’t come with a file name already indicating where the fault is from.

  • Press Windows + R keys
  • In the run box, enter eventvwr
  • Click Ok
  • In the Event Viewer, expand the Windows Log tab and click System
  • From the displayed page, you will be able to identify the driver causing the system thread exception not handled error by looking for the error message there and noting the driver associated with it.

Now, you can try the following to fix the error

Fix 1: Update Drivers

  • Go to Device Manager
  • Expand the Disk drivers tab
  • On the dropdown list, right-click on the driver responsible for the particular file in question and select update driver
  • In the pop-up window, select the option Search automatically for updated driver software to update it

Fix 2: Reinstall Drivers

  • Uninstall the faulty or outdated driver
  • Go to the manufacturer’s website and search for the befitting driver for your PC, download and install it following the manufacturer’s instructions.

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Fix 3: Perform Memory Diagnosis

If the blue screen error message is popping up as a result of a logical memory problem, this will fix it.

  • Press Windows + R keys simultaneously
  • In the run box, type mdsched.exe and click ok
  • The Windows Memory Diagnostic program will pop up. In the pop-up window, click Restart now and check for problems
  • Wait for it to finish diagnosis, then check result in Event Viewer

If your computer can’t boot into Windows or Safe Mode, try these:

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Fix 4: Restore PC to a Previous Version

If the system thread exception not handled error message started showing up after you upgraded to Windows 10, you can restore your PC to an earlier version that didn’t give you the same problem. To do this, you will need a system repair disc for Windows.

  • Insert a disc in PC
  • Choose preferred language
  • Click Repair
  • Click Troubleshoot >> Advanced options >> System restore
  • Then follow instructions given to restore to a previous version.

Fix 5: Reinstall Operating System

This method worked well for some. It might for you as well. Before you reinstall the operating system, backup or recover all data in advance. Use this option as a last resort.

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