System Thread Exception Not Handled Error Message: Fix

“System Thread Exception Not Handled” is a type of error which gets displayed on a Blue Screen of Death or which is known as BSOD. Most of the users who have reported this error were actually using Windows 8, 8.1 or 10. 

While few user has reported getting this error after 10 to 15 seconds of starting their computer, on the other hand, the rest have proclaimed of getting this error immediately after the Windows operating system start.

After this, their systems reboot, getting stuck in a loop making it difficult for them to use their computer. Starting your PC and finding this kind of an error can be really annoying at times.

This problem generally happens because of any driver failure. An old, damaged or unsuitable driver can cause your computer to display this blue error with the “System Thread Exception Not Handled” error message.

Any outdated driver and overclocking software, or a newly overclocked tweak can also be held responsible for causing this BSOD. 

If a newly installed program or a driver is indeed responsible for this problem; then the initial suggestion should be to uninstall them since they are clearly not compatible, and then keeping track of updates and try to reinstall when a bit or update to the driver has been released.

There are basically two methods to solve the “System Thread Exception Not Handled” error.

Method 1: Check Display Drivers

Display drivers are the most common reason for the  “System Thread Exception Not Handled” error to cause. In this method, we first need to uninstall the existing display drivers and then reinstall the latest version of the same display driver.

Just in case, you are able to log into Windows even for a few seconds, then jump to step 2, else start from step

Step 1: Boot into Safe Mode

While in safe mode, your drivers and services are disabled which are not required to work Windows operating system.

To start Windows 8Windows 8.1 and Windows 10 into safe mode, you have to turn your system on and make it shut down by pressing the power button and then turn it back on and redo the actions till the time the system boots in repair mode.

You may well have to do this for 4 to 5 times.The purpose is to anyhow trigger and force your system to go into repair/advanced mode.

Once That Is Done, You Need To Do The Following:
1. Click on Troubleshoot. 
2. Navigate to Advanced options and click on it.
3. Then in the following list, click on  Command Prompt.
4. After this, you will see black command prompt window appear on the screen. Now just type the following command and press the Enter key :BCDEDIT /SET {DEFAULT} BOOTMENUPOLICY LEGACY

Once that is done, type Exit and press the enter key again. After this, click continue.

After this, restart your computer and keep pressing the F8 button (for some users, it might be Shift + F8) until the Windows logo appears.

In the following window, highlight Safe Mode with Networking and press the Enter key. Now log in to Windows. You will be now using your Windows in the Safe Mode now.

If in case you can’t get the recovery options to display on the screen for some reason, then arrange an installation media of your Windows operating system, which can be either a DVD or make a bootable USB through Media Creation tool. You will require an 8 GB USB and a computer with internet access.

Enter the DVD into the CD drive or insert the USB into the port of the desired computer.Turn on the machine and keep pressing the F2 button to get an access to the Boot menu.

The button to start the boot menu may vary by your system’s model. Usually, for Dell it is F12, for HP it is F9. You might have to verify your system’s manufacturer’s website for yours.

Following accessing the boot menu, highlight and choose CD/DVD if you inserted a DVD, or choose USB drive if you inserted a USB.

If you are demanded to press any key to boot from the media, please do that. Click on Next if the time zone, keyboard layout preference, and language are as per your choice.

Now in the below-left corner, you will be able to locate repair your computer, click on that.

Momentarily follow the earlier-given order to start the command prompt and go into the safe mode.

Step 2: Uninstall Display Drivers

Press the Windows key and the R key simultaneously to open the Run dialog. In the Run dialog, type devmgmt.msc and press the Enter key.

Device manager window will show up on your screen now. In the device manager window, double-click on Display adapters in order to expand it. Under this will be your graphics card installed.

(Note down the full name of your display driver somewhere, before completely uninstalling it). Once that is done, Right click on it, and select Uninstall.

After that, click on Delete the driver software for this device option and click on OK. Reboot your system usually. Once your machine has restarted, video drivers will get installed automatically.

If that doesn’t happen, or in case you are still facing the similar problem again, then you will have to install the updated version of the drivers manually. To know the process of doing it manually, follow the step 3.

Step 3: Install/Update Drivers

In order to get a renewed version of drivers for your graphics card, you will have to enter your graphics card manufacturer’s website.

Explore according to your card’s model and download the suitable drivers fit with your operating system and system type (x64 or x86).

If you want to get information about both of them, then press the Windows key and R key simultaneously, type msinfo32 in the run dialog and press the Enter key.

In the system information window, write down OS type and System type in the right pane. The downloaded files are expected to be executable.

Just run it and do according to the instructions that are displayed on the screen.

If you don’t have an external graphics card installed, then you will have an integrated display adapter inserted into your motherboard.

Go to your motherboard’s manufacturers website (The one whose logo shows up initially when you turn on the power on your system) to get updated drivers for your onboard graphics adapter.

Along with the operating system and system type, you will also require your system model, which is also specified in the System Information window.

The downloaded file here will also be executable. Just run it and follow the instructions which get displayed on the screen.

Method 2: Rename the Faulty Driver

In case right next to “System thread exception not handled” error message, you can notice a file named, such as atikmdag.sysnvlddmkm.sys, etc.. in a bracket, then we can change the name of the culprit driver into another name that the windows can’t detect. This will result in the Windows fetching a new copy of the driver file.

Go to the command prompt through the procedure mentioned above in the first solution.

In the black window which follows, type the below-written commands, and press the Enter key after each line.

  • c:
  • dir

If by chance, the results of the dir command display a folder titled “Windows” then know that, this is the target drive. If that doesn’t happen, type d: and press the Enter key.

Now type the below-written commands and press the Enter key after each line :

  • cd windows\system32\drivers
  • ren driver name.sys driver name.old

In the above command, driver name is the name of the fault driver, e.g atikmdag.sys.

Reboot your computer. The driver which we deleted earlier will be installed automatically. If it doesn’t happen that way, log in by normal mode, press the Windows key and R simultaneously. Type devmgmt.msc in the run dialog that comes up next. Press the Enter key.

The uninstalled device driver will have a yellow exclamation mark. Right click on it and click Update Driver Software.

Click Search automatically for Updated Driver Software. Windows will search for the driver online and install it once it finds it.