Norton 360 drivers nllStm.sys and nllArPot.sys.crashes my PC

Norton 360 for Windows
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Norton 360 causes my computer to constantly restart, both while gaming and using other applications. I ran Driver Verifier, which identified two Norton files as the cause of the error: nllStm.sys and nllArPot.sys. Reinstalling or repairing Norton didn’t help, and tech support couldn’t find a solution. I finally had to completely uninstall Norton 360, and the problem seems to have gone away. Has anyone had similar problems and found a solution? I’m using the latest version of Windows 11 Pro, a GeForce RTX 2070 Super graphics card, 32 GB of RAM, a Ryzen 7 3800X, and a Gigabyte X570 Aorus Pro motherboard.

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den er sendt vider til norton nu

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@Jaroslaw_Gornas Did you by chance see a “DPC_WATCHDOG_VIOLATION (133)” notice or similar? Those drivers are notorious for BSOD’s on high end gaming systems. Is there ANY other security software installed or, enabled in the BIOS?

SA

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Hi. never seen DPC_WATCHDOG_VIOLATION (133) error. Only IRQL_NOT_LESS_OR_EQUAL, SYSTEM_SERVICE_EXCEPTION, or KMODE_EXCEPTION_NOT_HANDLED (only once). I don’t use other security software, only Norton360

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The error " KMODE_EXCEPTION_NOT_HANDLED" is usually indicative of hardware failure and or driver issues. The error “IRQL_NOT_LESS_OR_EQUAL, SYSTEM_SERVICE_EXCEPTION” also indicates “possible” hardware/drivers issues. Here are some suggestions, Try the ones in bold lettering first:

**PLEASE NOTE THAT AI INFO CAN CONTAIN MISTAKES

AI Overview

IRQL_NOT_LESS_OR_EQUAL and SYSTEM_SERVICE_EXCEPTION in Windows 11 are
critical Blue Screen of Death (BSOD) errors typically caused by corrupted system files, incompatible drivers (especially graphics or network), faulty RAM, or recent software updates. Fixes involve updating/reinstalling drivers, running sfc /scannow and dism, running the Windows Memory Diagnostic tool, and removing recently installed hardware or software.

Immediate Actionable Solutions:

Update/Reinstall Drivers: Open Device Manager, identify exclamation marks, and update drivers (especially Display Adapters, Network Adapters, and Audio).
> Run System File Checker (SFC): Open Command Prompt as Administrator, run sfc /scannow to fix corrupt system files.
> Run DISM Tool: In command prompt, run dism /online /cleanup-image /restorehealth to repair the Windows image.

  • Check RAM: Type “Windows Memory Diagnostic” in the search bar, select it, and choose “Restart now and check for problems”.
    *** Run Check Disk: Run chkdsk /f /r in Command Prompt to scan for file system errors.**
  • Disable Overclocking: Reset BIOS/UEFI settings to default if you have overclocked your CPU or RAM.
  • Uninstall Recent Updates: If the error started after a Windows update, go to Settings > Windows Update > Update history > Uninstall updates.
  • Perform a Clean Boot: Use System Configuration (msconfig) to disable non-Microsoft services to rule out third-party software conflicts.

If these do not work, consider performing a system restore to a point before the errors began or, as a last resort, resetting your PC

SA

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Hello again.
Of course, I tried these solutions before, but they didn’t help. I solved the problem by removing Norton 360 from my computer. Now everything works fine, and there are no errors. So it was clearly Norton’s fault. I’m waiting for a solution and a patch for the program, and if that doesn’t happen, I’ll simply cancel my Norton subscription.
Best regards.

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