[Fix] System Thread Exception Not Handled BSOD Error in Windows 8 and 10

System Thread Exception Not Handled Blue Screen of Death (BSOD) is a very common problem among Windows 8 and Windows 10 users. And could occur anytime while start-up of Windows or while doing any random work. It’s unpredictable when it can occur, but for most users, it usually occurs at boot time. So we are mentioning several ways (applicable to both Windows 8 and 10 users) to fix this issue for users who gets BSOD at startup or when it appears unpredicted. And any of the solution will NOT require you to have bootable media of Windows 8 or 10 as most users don’t have these by default.

Solution For System Thread Exception Not Handled in Windows 8 and 10

We have already written a solution of Windows 10 Blue Screen of Death (BSOD) and Internal Power Error. You should read this first before trying below given solutions.

Windows 8 and 10 has inbuilt recovery and if you ran into any startup issue during boot of OS, it’ll show up offering you options to fix your computer. But the question is, how to reach those options. Many people suggest to use Bootable CD or USB for windows, as they help getting users the same tools with convenience which are already there is operating system recovery system. So, in order to get into recovery mode of Windows 8 or 10, do following steps:

[Fix] System Thread Exception Not Handled BSOD Error in Windows 8 and 10[Fix] System Thread Exception Not Handled BSOD Error in Windows 8 and 10

  • When you get BSOD, just close the PC using power button, press it continuously till it get switched off.
  • Power ON and OFF it abruptly when Windows logo appears during boot process. Repeat this 3-4 times, until windows show you various recovery options.
  • Assuming you reached the Windows 8 or 10 recovery options, go into Troubleshoot > Advanced Options > Command Prompt.
  • Run following command in it:

sfc /scannow /offbootdir=c:\ /offwindir=c:\windows

  • It’ll find some errors but shall not be able to fix all. Also run following command then:

bcdedit /set {default} bootmenupolicy legacy

  • Now close the command prompt and reboot the computer.

Also Read: Ultimate Guide to Turn off Windows 10 Privacy Settings

Find the Driver Which is Causing You Trouble

  • Install this free application named: WhoCrashed and run this utility to find out which driver is causing you SYSTEM_THREAD_EXCEPTION_NOT_HANDLED BSOD error.
  • Output of the utility should be similar as below:

If you check the file path, it shows that atikmdag.sys is the troublesome driver for me. It can vary for most users.

Or if you’re not in a condition to run the utility, then do following steps:

  • Now you need to open the computer in Safe mode. So, as soon as you turn ON the computer, keep pressing F8 function key along with it, until the OS shows you a menu of boot options.
  • Select Safe Mode and Enter.
  • During the boot or after login, when you get BSOD again, you’ll also find a file name along with System Thread Exception Not Handled. Output would be like System Thread Exception Not Handled (FILENAME.sys) where FILENAME could vary for users.

Following is a list of those FILENAME’s along with the associated driver:

  • Note down the file name somewhere.
  • Reboot and again you to abruptly restart computer to get into recovery mode of Windows 8 or 10.
  • Navigate to Troubleshoot > Advanced Options > Command Prompt.
  • Run following commands in command prompt:

where FILENAME is the one you noted in above step. Like i had error because of atikmdag.sys, hence for me the command is:

ren atikmdag.sys atikmdag.old

  • Close command prompt and Reboot.
  • Now your computer should boot successfully.
  • Re-install updated driver which caused you all this trouble or everything is working fine, then leave it. Windows shall automatically take care of it.

Also Read: How to Stop Windows 8/10 Installing Driver Software Automatically

Solution 2

In case, you’re not getting success in reaching safe mode, then may be you can try this way to boot computer successfully:

Turn it off, remove the battery, unplug it from its power source, leave it off a few minutes, hold down the power button for 5-10 seconds, plug power back in BUT NOT THE BATTERY, turn on laptop. It should start normally. Then put battery back in at your earliest convenience. Once PC boots successfully, remove that driver which is causing you trouble and Reboot again.

Also Read: How to Completely Disable Cortana in Windows 10?

Solution 3

In case if you get BSOD in unpredicted manner frequently, then may be you should try disabling hardware acceleration in browser and flash. Disabling hardware acceleration for every browser would be different.

Disable Hardware Acceleration in Chrome

  • Open Google Chrome.
  • Type in chrome://flags in address bar and Enter.
  • Scroll down and navigate yourself to “GPU composting on all pages“.
  • Select “Disabled” from the dropdown. It would be “Default” by default.

GPU composting on all pages

  • Click Relaunch Now. Chrome will close and restart.

Disable Hardware Acceleration in Mozilla Firefox

  • Open Mozilla Firefox
  • Type in about:preferences#advanced in address bar.
  • Uncheck “Use hardware acceleration when available“.

Disable Firefox Hardware Acceleration

  • Close and Restart Firefox.

Disable Hardware Acceleration in Internet Explorer

  • Open Internet Explorer
  • Click Tools > Internet Options
  • Select “Advanced” and under “Accelerated graphics“, check box “Use software rendering instead of GPU rendering“.

Disable Flash Hardware Acceleration IE

  • Apply and OK.
  • Restart Internet Explorer.

Disable Hardware Acceleration of Adobe Flash Player

  • Scroll down to Step 5 that has animated tree embedded flash object.
  • Right click on the animation and select “Settings“.

Adobe Flash Player Settings

  • Dialog box of Adobe Flash Player Settings would open.
  • Uncheck “Enable Hardware Acceleration“.

Disable Flash Hardware Acceleration

  • Close
  • Restart the Browser.
  • Repeat the steps with other installed browsers.

Hopefully, now you should not get Blue screen of death again on your computer with Window 8 or 10. If you encounter any issue, please ask in comments. Below is a video with additional ways to encounter this issue:

85 COMMENTS

    • rtsuvc.sys is because of your webcam driver. Probably getting new drivers installed of your webcam or any external camera should fix the issue.

  1. for solution 1:bcedit /set {default} bootmenupolicy legacy

    is it typo as ‘bcedit” is not recognized as an internal or external command, operable program or batch file.

    • If you’re using a 64Bit OS and facing this issue, you can run BCEDIT from following path:

      C:\Windows\Sysnative\bcdedit

      OR

      You should check if your BCEDIT is damaged or not. For doing so, run following command in command prompt:

      sfc /VERIFYFILE=C:\windows\system32\bcdedit.exe

      If the file is fine, you should get output like this:

      Windows Resource Protection did not find any integrity violations.

      or if the file is damaged, then either running a complete system scan should bring back BCEDIT command:

      sfc /scannow

    • Not really, as upon re-installing, same drivers would get installed again which are causing the trouble. You must try the solutions given above, before before coming to an conclusion of wiping the PC.

    • Tried finding the solution of your issues, and it seems like it’s more of the gaming drivers. You probably need to get rid of Gamingguard (if applicable) until they patch the driver issues.

  2. robert
    none of the fixes work for me
    I’m stuck in BSOD. Cannot get into safe mode
    scannow does not report errors
    bcdedit did not restore anything

    cannot get into OS to roll back w10

    what next

    • Then your problem should be temporary or your RAM could be faulty or there could be errors in hard disk. If you have multiple physical RAM, then swap their slots. Or you must update your windows with all latest updates. No file name means you’re not facing this issue because of any software driver.

  3. How can I fix the system exception not handled BSOD when the file name is wlanuhn.sys?
    From what I have been able to gather, wlanuhn.sys appears to be related to my Qwest 11n Wireless USB adaptor. I have tried to update the drivers for it through device manager, and it tells me that the adaptor already has the latest drivers. I am currently running Windows 10.

  4. Hi I am unable to get pas: your pc ran into a problem and needs to restart. We’ll restart for you. All it does is re- start on a loop. No option to crash it or wipe it or anything. I dont have a bootable disc and have so much on the disc I will loose everything if I wipe it. Help.

    • Create a bootable pen drive of Windows 10. Check the internet for those tutorials. Also, before you do anything, take out the hard disk and attach it to some other computer and take the data backup first before doing anything you’re not sure of.

  5. I have the “SYSTEM_THREAD_EXECEPTION_NOT_HANDLED” BSOD error, with no file name afterwards. I am able to access safe mode, how can I fix from here? Thanks.

    • May be you should clean your computer, including taking out RAM, swap if multiple, put it back and see if error occurs again.

  6. Help! I for some reason cannot access the recovery system for my windows 10 laptop even though i already repeatedly abruptly turn on and off my pc. Everytime i checked, it just continues the BSOD

    • There is a physical button to access recovery on some laptops. If you have that, maybe you can try entering recovery using that option.

    • You should find and installed the updated driver then. The one you’re installing right now doesn’t seem to be supporting the hardware or not compatible with something in OS.

  7. Hi.. through using cmd and sfc /scannow code… it says.. Windows Resource Protection could not start the repair service.
    What i must do..??
    Thnx in advance.

  8. Hi Robert,
    My Toshiba computer keeps giving me this BSOD. After I got it, I turned my computer completely off. Now when I try to turn it back on(tried multiple times), the only thing that comes up is the light from the keyboard and not the screen. It keeps turning on and off by itself when I don’t even touch it. Got any idea on how to fix this? (I unplugged it from the wall and tried it and took off the battery. I even tried to wait some time and do it, but there was no luck.)

    Thanks in advance!

  9. Hello, I have had experienced the same problem and this helped me a little, I have just gotten to the command prompt and ran the first command. However, during the process of scanning, it stated that there is a system repair pending that requires reboot to complete. And wants me to restart Windows and run the process once more, even though it will just loop back to the system repair pending. I am at a dilemma on what to do now, and would like some help on this. Should I try to override (if I even can) the system repair or what? Please reply as soon as you are able to. Thank you for taking the time to read this, and if the problem had been resolved, thank you for helping me.

  10. Sir , can you tell me NTFS.sys means what ? And what should I do ? I’m not that much technological so please tell me out ….. !!

    • On which operating system you’re? Windows 7? I believe for resolving your error, you’ll have to reinstall Windows.

  11. This is happening to me twice now in the last two days. I just had WINDOWS 10 INSTALLED. I can’t do anything. Just wait until the blue notice disappears and then manually shut down my SONY LAPTOP.
    This is disgusting. I was happy with my WINDOWS 7 and now this. I used to use Windows Live for my emails and when installing WINDOWS 10…LOST my Windows Live plus all the files I had attached. I’m so angry and would like to go back to Windows 7 and forget this NEW 10 DEAL.

  12. I used WhoCrashed like you said and found out it’s a file called “stdriver64.sys”. I went to the command prompt and tried to type the name in following your example but it says it can’t find the file. I must confess I’m not acquainted with command prompt and dos language or whatever it is, I just typed down everything you wrote as you wrote it and replaced filename with “stdriver64.sys” and “stdriver64.old”. Can you help me? Thanks

    • Hi Freddie, apologies for late reply. I did a bit of research on your issue and found that BSOD in your computer is being caused by any software installed of “NCH software,” probably “SoundTap Streaming audio recorder” or could be anyone else. Hence, uninstall that software, run a registry cleaner via software like CCleaner and your problem should be solved.

  13. please help me

    Your PC ran into a problem and needs to restart. We’re just collect info, and then we’ll restart for you. (40% complete) If you’d like to know more, you can search online later for this error: SYSTEM THREAD EXCEPTION NOT HANDLED (nvlddmkm.sys)

    • Hi Robert, I’m experiancing the same problem as mentioned above (nvlddmkm.sys).
      Any idea how I could solve this ?
      Thanks in advance.

      • Fix Nvidia Nvlddmkm.sys Error Message

        Go to your NVIDIA folder (located in C:\NVIDIA), and look for the file named nvlddmkm.sy.

        Next, copy the file at the root of C:. In most cases, this file name is C:\nvlddmkm.sy_.

        Now, head to the system folder that houses your drivers (in many cases, this is C:\Windows\System32\drivers\).

        Locate the nvlddmkm.sys file, and rename it as nvlddmkm.sys.old.

        Now, open the command prompt by pressing the Windows key + R and typing cmd.

        Type cd, followed by the Enter key. Then, type expand.exe nvlddmkm.sy_ nvlddmkm.sys, and press Enter again.

        This command will allow you to unzip the nvlddmkm.sys file (which was previously saved at the root of C:) and create a new file instance.

        Copy the new file to C:\WindowsSystem\32drivers, and then restart your PC to let the changes take effect.

        • Hi Robert, thanks for your reply. It took me some time to figure things out, but this is how it went down.
          The file NVLDDMKM.SY_ was found in C:\ProgramFiles\NVIDIACorporation\Installer2\Display.Driver.0. I copied the file to the root of C:, but was unable to expand it there (not able to open output file). I moved it to another directory and that worked.
          In C:\Windows\System32\Drivers there was no NVLDDMKM.SYS, so nothing to rename. I copied the expanded file into that directory and restarted the PC.
          After a few hours the blue screen came back and since then a number of times.
          When I perform a search on my C: drive for the file NVLDDMKM.SYS I get 23 results. One of them is the file in C:\Windows\System32\Drivers (Version 8.17.12.7533 of 2011), the other 22 are located in 22 different directories, all starting with C:\Windows\System32\DriverStore\FileRepository and then for example nvmowu.inf_amd64_a9c3add7483ca8dd or nvpcdwu.inf_amd64_995a4ef70644e93e (all Version 21.21.13.6909 of august 27 2016).
          Any thoughts on that ? Should I replace them all ?
          Thanks for your time.
          Regards, Sylvio

          • I think fixing the one you found at C:\Windows\System32\Drivers should do the thing. If the issue still appears, then I might won’t have any idea to assist you further on this.

            • After placing the newest file in the driver’s section, the problem is solved. Not at once, but after a few restarts. Have been without bluescreens for a few days now.

              Thanks for your time and advice.

            • I have the same problem, and tried to follow the steps you’d given, but the driver was absent from my win32 drivers folder, so I don’t know what to do, lol.
              Also worth mentioning I have an asus G75, just like that other guy, anthoo12.

    • You must have a Broadcom Wireless 802.11ac adapter in-built. Either get latest drivers of that wireless adapter, directly update it from device manager or check official website of your laptop brand or of Broadcom. If still the issue persists, disable inbuilt wireless adapter, and buy a USB wireless adapter from the market. You’ll get a new one of D-link, Netgear (preferred) or Tp-Link at dirt cheap price.

  14. Error: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M
    file path: C:\Windows\system32\ntoskrnl.exe
    Yesterday i reinsalled windows 8.1 to windows 10.
    Today another blue screen:

    crash dump file: C:\Windows\Minidump\090516-8234-01.dmp
    This was probably caused by the following module: ntoskrnl.exe (nt+0x45C40)
    Bugcheck code: 0x1000007E (0xFFFFFFFFC0000005, 0xFFFFF802F285FC40, 0xFFFFDF0007435688, 0xFFFFDF0007434EB0)
    Error: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M
    file path: C:\Windows\system32\ntoskrnl.exe
    product: Microsoft® Windows® Operating System
    company: Microsoft Corporation
    description: NT Kernel & System
    Bug check description: This indicates that a system thread generated an exception which the error handler did not catch.
    This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
    The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.

    HELP! Please!

    • Check your memory

      The ntoskrnl.exe BSOD is usually related to memory so you might need to simply replace your RAM. Take out each stick of RAM one by one and try to boot your system, this may help you find the faulty memory but the lot might need replacing.

      Overclocking

      If you’re overclocking your system with a higher CPU clock speed, put this back to normal as it might be causing problems.

      Update drivers

      If you have a RAID setup of disk drives, update your drivers. Also update other drivers for hardware as this problem can be caused by drivers not matching the OS.

      • Hi I am literally having the same issue as this person. I am going to replace all the ram with new ram to test it out. I am currently not overclocking and I have updated all my drivers. I have had many different bsod with different codes such as PFN_List_corrupt and more commonly KMODE_EXCEPTION_NOT_HANDLED. Every time I try and find a solution different people tell me its my drivers. Ive checked and double checked and triple checked and attempted to update all my drivers and everyone says they are up to date. I just bought its computer and I have had nothing but trouble with it. Running games and it crashes the games mid way through with no error. The games just say not responding and crash. CSGO cant run above medium settings because it will just instantly crash on loading screen. And I know this PC can run everything on high. I dont know if an overwhelm of the ram or bad ram could cause all of this but it would be great to hear back from you. Also, my event viewer has been giving me errors for nvraid and also hdd saying there is bad blocks. Any help would be great.

        • If you’ve any Nvidia software installed, uninstall it and see if the issue persists. Also run sfc /scannow in cmd as administrator and let it take the sweet time it may require completing. After that, you should consider checking RAMs of your PC.

      • Thanks for You reply.
        I checked my RAM with Memtest86-11 hours and 0 errors.
        My CPU running at default clock.
        I dont have RAID setup…
        Also, SMART of all disk is good…

        • Remove any display driver software you have and restart. Now update it online from device manager only. See if that resolves your issue.

  15. I am on a windows 10 laptop, laptop randomly turned off and now I have BSOD with system threads exception not handled but with no file name.

    What do I do for a laptop? Cheers.

  16. Hi Robert. First of all, thanks for this posting. I have the same issue now with Windows 10 – 64 and in my case it says “SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (lvrs64.sys). I been in Contact with Microsoft support 3 times as I pay for premium support. But unfortunately it has not been that premium. I tried to solve it myself as well. Microsoft claim this is due to web cam driver and/or graphic card driver. I uninstalled both drivers and updated them, but I still enounter the same problem.

    I do get a feeling that this BSOD is more likely to happen when I use Skype and Facebook or Youtube at the same time. So far I updated Windows 10, got new graphic card drivers from Dell and new cam drivers from Logitech. Any suggestions and other things I should check or do?

    Cheers!

  17. It did repeat several times these past Days. But finally I found out that it is the Logitech cam driver that cause this issue. I been in Contact with Microsoft and Logitech. Both of them blame each other and expect that the other one will fix this issue. So the only solution I can see is to find a non Logitech cam with drivers that is compatible with Windows 10

  18. Hello, I’ve just found your site by searching a solution for the described problem. In my case it’s “win32full.sys”.
    As i’ve just read all the page, I’ll try the given solutyions and then i return to say if it’s working or not. It it’s ok, it can help probably others.
    Tia, Come back soon

    PS fortunately i have always a second disk installed with W7, so i can yet use my pc. Having 2 os on the same pc is ok, I asked Ms and they said, so long it is on the same computer, there is no problem as you cannot use the 2 os at the same time.

    • Ha20x22k.sys is a type of SYS file associated with Sound Blaster X-Fi Technology developed by Creative Technologies Ltd. for the Windows Operating System. So, probably you don’t have internal sound driver latest or the driver of any additional sound card is your issue. If you’re using an additional sound card, remove that temp until you found the latest driver of it to install. Try and let me know, if you face any error further.

  19. Dear Robert

    If kindly is possible, please tell me what is my problem?

    I have a BSOD message with “system-thread-exception-not-handled” in windows 10, 4 days ago one times.
    In blue screen output NTFS.sys can be viewed.

    Also, I have uploaded the minidump file as follows:
    **LINK REMOVED**

    If kindly is possible, please tell me what is the basic problem?

    Is it from graphic driver?
    Or from hard disc?

    With kind regards,
    Emran.

    • Hello,

      You should try running this tool – https://msdn.microsoft.com/windows/hardware/drivers/devtest/driver-verifier and see if this can fix something.

      Also, try changing your RAM if possible, or test it by borrowing it from some friend for a while.

      Uninstall your antivirus program & graphics driver and see if BSOD appears again.

      Update your BIOS to the latest driver if possible.

      Disable HDD S.M.A.R.T. Capability in BIOS options if this setting is enabled.

      If BSOD issue resolves, ensure to install the updated graphics driver and any other antivirus app.

      Hope this helps.

  20. So the bsod problem with the filename Netwtw04.sys seems to be gone but now i cant connect to the wifi, is there a relation between the two and how do i fix it? What if it is Netwtw04.sys?

  21. Hi,
    I was waching a video and a blue screen poped up.
    After that, it keeps showing BSOD of KMode exception, Attemped excute or noexcute memory, IRQL Not Less or Equal, System Service Exception, unexpected kernel mode trap and so many various error codes. I format my ssd and installed new Windows 10, but it still shows that same errors. I unplugged graphic card and Rams and plugged them in again and checked if they are perfectly setup. I do not know if my mainboard died, but this is a new board. I can not get in safe mode.
    Please help me..

    p.s.
    sometimes it let me get in troubleshooting, but it freezes up with bsod of DPC Watchdog error…

  22. I got the following BSOD:

    FLTMGR.SYS FLTMGR.SYS+312e fffff8055c710000 fffff8055c772000 0x00062000 0x578997a5 7/15/2016 8:10:45 PM Microsoft® Windows® Operating System Microsoft Filesystem Filter Manager 10.0.14393.0 (rs1_release.160715-1616) Microsoft Corporation C:\Windows\system32\drivers\FLTMGR.SYS

    ntoskrnl.exe ntoskrnl.exe+6c58b fffff800b9002000 fffff800b9822000 0x00820000 0x584a77f6 12/9/2016 3:23:02 AM Microsoft® Windows® Operating System NT Kernel & System 10.0.14393.576 (rs1_release_inmarket.161208-2252) Microsoft Corporation C:\Windows\system32\ntoskrnl.exe

    How do I fix this? I have seen the fltmgr.sys issue with other BSODs.

  23. Hi Robert so glad i found your page i cant do anything on my laptop it is giving me a bsod with the topic recovery and the usaual your device has a problem and the file is wpprecorder.sys then error code is 0000000221 something like that i can’t do anything bro please help me

  24. Please help. The bsod says its file atikmdag.sys but when I put in the command it says “the system cannot find the file specified”. What can I do next? Thank you.

  25. Apparently, atikmdag.sys is a common problem. I’m using Windows 8.1 on an AMD HP laptop. I should be able to fix this without spending money shouldn’t I? Waiting for an answer from AMD. Thanks for any assistance.

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