System Thread Exception Not Handled Error – {Fixed}

A lot of Windows users reported that they face System Thread Exception not handled error when they try to boot Windows. Sometimes this error appears while you are using the computer and then restarts.

This error is mostly faced by people who use Windows 8, 8.1, and Windows 10.

Blue screen of Death is a stop error or exception error that displays fatal system errors. If you see this screen on your computer that means your Windows operating system cannot operate safely.

The system thread exception not handled error appears on the Blue Screen of Death(BSOD) that indicates it is a fatal error and must be fixed immediately.

So, let us understand what is the iaisp64.sys error, What are its causes, and what are the possible methods to fix this error.


Introduction to the error:

The Windows operating system throws System thread exception not handled error when it finds any fatal error on the system and is not able to handle it. And also the system gets stuck in the restart cycle so you have to boot the system in safe mode to end it.

This problem mostly appears when you boot the system. But sometimes the system can also throw an error while you are using the computer and that gets annoying.

Though this error appears on the blue screen of death it is a common Windows error and can be fixed.

This error is sometimes accompanied by numbers For eg 0x0000007E, 0x1000007E, which helps the users understand where the problem is.

But if you are lucky enough then the error will be accompanied by the file name that is causing the error. For eg: etc.

Let us see what does this file name indicates.

What does the file name attached to the System Thread Exception Not Handled error mean?

If you get a filename attached to the error that means the system is indicating which Graphic driver is causing the problem so all you have to do is delete or repair that file.

Here’s the list of filenames that could be attached to the error System Thread Exception Not Handled:

1. iaisp64.sys: It is an Intel Imaging Signal Processor 2401 driver. If you get iaisp64.sys after the error that means this driver is causing the error. This can be fixed by uninstalling and reinstalling it.

2. Atikmdag.sys: This is a graphic driver from the family ATI Radeon that relates to your ATI video card. There may be chances that the driver installed for this video card is not properly installed due to which you get the error.

3. Nvlddmkm.sys: If you have Nvidia powered graphics card installed on your system that means the drivers for this graphics card are not properly installed. This graphics driver is for the Nvidia Windows kernel driver and t is related to your Nvidia video driver.

4. Dxgmms2.sys: If you find this file name attached to the error that means the error is caused due to the DirectX drivers installed on your computer.

5. Ntfs.sys: The Ntfd.sys file name indicates the error is caused due to the Windows NT server.

6. CMUDA.sys: The cmuda.sys driver is for the USB audio device. Reinstall and install the audio drivers to fix the error.

So, if you face the error along with the file name just go to the driver associated with the file name. However, if you are stuck in the Restart loop then you will have to boot the computer in safe mode.

Possible methods to solve the System Exception Not Handled Error on Windows:

Let us see what are the possible methods that you can try to fix the System Exception Not Handled Error on your Windows 8, 8.1, and 10 computers.

1. Run sfc/scannow and DISM command to fix the error: 

There are chances that the computer is throwing the errors because of the corrupted files. So if your computer has corrupted or missing files then you can repair them through Windows repair program SFC and DISM. To do it follow the below steps:

1} Go to search and type cmd and click on Run as administrator to open the command prompt as administrator.

2} Next type the command sfc/scannow and hit enter

3} Wait for few seconds till it verifies all the file and if it finds any corrupted files then it will fix it automatically.

sfc command to fix System Thread Exception Not Handled Error Fixed

If the SFC command does not fix the error try DISM command for resolving this issue. Here are the steps to perform:

1} Open the command prompt as Administrator.

2} Type the command “DISM /Online /Cleanup-Image /CheckHealth” and hit enter.

3} Wait till it finds the corrupted files.

4} If it finds some corrupted files then type the command “DISM /Online /Cleanup-Image /RestoreHealth” and hit enter

How to fix System Thread Exception Not Handled Error

2. Find the faulty Driver and fix it:

If you don’t know which one is the faulty driver then you can follow the below steps to find the faulty driver and fix it.

1} Press the key combination Windows + R on your keyboard to open the Run prompt.

2} Type “eventvwr” and hit enter to open the event viewer.

steps to find faulty driver to fix the System Exception Not Handled Error

3} Now on the Windows logs dropdown menu and in that click on System to view all the recent events.

4} Scroll down and search the driver that is associated with the system_thread_exception_not_handled  error and fix it manually.


Update, Rollback, or uninstall the drivers on the computer:

The system_thread_exception_not_handled can also be caused because of an outdated driver. But if you have the most recent version of the driver then you can reinstall the driver. It can be done from the device manager. Here are the steps to do it:

1} Go to the control panel and click on Hardware and Sound. In that click on Device manager under Device and Printers.

2} Or press the key combination Windows + R and type “devmgmt.msc” and hit enter to open device manager

3} Click on each menu options and open the devices. Go to the drivers tab and updaterollback, or uninstall the driver according to the requirement.

how to update, rollback, uninstall driver on Windows

Repair or delete the corrupted system files:

Corrupted system files can be the major reason for the system_thread_exception_not_handled error in Windows computers. So here is the easy way to find the corrupted files and repair them.

1} Open the run prompt by pressing the key combination Windows + R on your keyboard.

2} In that type “CHKDSK C: /F /R” and hit enter.

3} In the Last step follow the instructions on the screen and Windows will restart and find all the corrupted files in the system.

steps to repair corrupted system files to fix System Exception Not Handled Error on Windows

Rename the corrupted drivers:

If you get the system_thread_exception_not_handled error with file name attached to it like iaisp64.sysDxgmms2.sys, etc. then you can fix that error by changing the file name of the particular driver. If you change the name Windows will not be able to find the faulty file. To do it:

1} Click on search >>type cmd and click on Run as administrator to open the command prompt as administrator.

2} Next type the command “cd c:\windows\system32\drivers” and hit enter.

3} After that type “ren FILENAME.sys<space>FILENAME.old” and hit enter (Replace FILENAME with the driver file name that is causing the error)

4} After that restart your computer and you will be able to boot your computer normally.


Uninstall the recently installed programs:

If you started facing the system_thread_exception_not_handled error after you installed a program then there are chances that the program is causing the system to throw the error.

So, uninstall that program and check if the error still appears on the Blue screen

To uninstall go to control panel >> Click on Uninstall a program >> Tap on the program that you want to remove and click on uninstall.


Reset or install new Windows:

If the above methods do not help you solve the issue then another thing that you can try is resetting your Windows computer. To reset your computer follow the below steps:

1} Go to search on the taskbar >>type settings and hit enter

2} In the settings window, go to the Recovery option in the side navigation bar

3} Click on get started to begin the steps to reset your PC

If the error persists even after resetting your pc then the last option is to install new Windows.

how to reset your computer on WIndows

Final Words!!

In the above article, we have discussed how we can fix the system_thread_exception_not_handled error on your Windows computer. So if you are facing the same error then read the above article for solutions. Also, let us know in the comment box which article helped you solve the error


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