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The thread concerns GSOD crashes with SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (0x7E), implicating dxgmms2.sys, on a Ryzen 5 5500GT system after installing Windows 11 Insider build 29661.1000. Contributors suspect an Insider-build regression or graphics-driver interaction rather than immediately blaming hardware or Chrome, recommending crash-dump and version/driver checks, updated or rolled-back AMD drivers, disabling Chrome hardware acceleration, and possibly returning to a stable Windows release. No confirmed fix is reported, and the overall sentiment is cautious and evidence-focused.
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I am experiencing issues with my new PC—equipped with a Ryzen 5 5500GT CPU, 16GB of RAM, and a Gigabyte A520M K V2 motherboard—after updating to Windows 11 Insider Preview build 29661.1000. Whenever I leave a Chrome browser window, a website, or an application open, a "Green Screen of Death" (GSOD) occurs with the error code `SYSTEM_THREAD_EXCEPTION_NOT_HANDLED` (0x7E). Please help me resolve this issue so that my computer can run without encountering the GSOD or spontaneously restarting.
 

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WindowsForum AI

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Hi nayphethaythxngs—your photo shows SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (0x7E) and “What failed: dxgmms2.sys.”
dxgmms2.sys is part of Windows’ graphics memory management and scheduling system. This identifies the graphics subsystem as an investigation target, not proof of defective hardware or a Chrome fault.
Because this started after the Insider update, a build regression or graphics-driver interaction is possible, but we need evidence to distinguish them.

Please gather these read-only details​

  1. Open PowerShell, run the following command, and paste the output. It only reads your graphics adapter and driver information:
    Code:
    Get-CimInstance Win32_VideoController |
      Select-Object Name, DriverVersion, DriverDate, PNPDeviceID |
      Format-List
  2. Press Win + R, enter winver, and share the displayed Windows version and build.
  3. Open File Explorer and enter %SystemRoot%\Minidump. Tell us whether there are .dmp files dated around the crashes. Do not change permissions if access is denied—just report that. Crash dumps may help identify the actual fault, but can contain sensitive information.
  4. Clarify the crash pattern: does it happen while you are actively using the PC, only after leaving it idle, or when the display turns off? Does it also happen with Chrome completely closed?
Also, was the PC stable before this update, and are you using the Ryzen’s integrated graphics or a separate graphics card? These details will help us choose a targeted next step without unnecessary system changes.
 

datawizard0103

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I am experiencing issues with my new PC—equipped with a Ryzen 5 5500GT CPU, 16GB of RAM, and a Gigabyte A520M K V2 motherboard—after updating to Windows 11 Insider Preview build 29661.1000. Whenever I leave a Chrome browser window, a website, or an application open, a "Green Screen of Death" (GSOD) occurs with the error code `SYSTEM_THREAD_EXCEPTION_NOT_HANDLED` (0x7E). Please help me resolve this issue so that my computer can run without encountering the GSOD or spontaneously restarting.
Since this started right after the Windows 11 Insider build update, I’d recommend first checking the crash dump in `C:\Windows\Minidump` to identify the driver causing the `SYSTEM_THREAD_EXCEPTION_NOT_HANDLED` error. Then update the AMD chipset and graphics drivers and the motherboard BIOS, and temporarily disable XMP or any overclocking. If the GSOD continues, rolling back from the Insider build to the previous stable Windows 11 version would be my next step, since the preview build itself may be the cause.
 

James Adam

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This looks more like a Windows Insider build/graphics-driver issue than a hardware problem, especially since the GSOD started after upgrading to build 29661.1000 and occurs while Chrome or other applications are left open.

troubleshoot it in this order:

  1. Go to Settings → Windows Update → Check for updates and install any newer Insider build or cumulative updates available.
  2. Open Device Manager → Display adapters → AMD Radeon Graphics → Properties → Driver and note the driver version. The Ryzen 5 5500GT uses integrated Radeon graphics, so the display driver is worth checking first.
  3. Install the latest Windows 11-compatible Radeon driver for the Ryzen 5 5500GT from AMD's official support page, or roll back the driver if the problem started immediately after a driver update.
  4. As a temporary test, open Chrome → Settings → System and disable Use graphics acceleration when available, then relaunch Chrome.
  5. If the GSOD continues, check C:\Windows\Minidump for a recent .dmp file. A crash dump can help identify whether the graphics driver or another system driver is actually causing SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (0x7E).
Because this is an Insider Preview build, you should also consider temporarily moving back to a stable Windows 11 release if the problem persists across driver updates. Avoid changing BIOS settings or replacing hardware until the crash dump and driver information have been checked.
 

WindowsForum AI

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James, the graphics subsystem is a reasonable investigation target, but we should collect evidence before making changes.
The photo identifies dxgmms2.sys, a Windows graphics component. That does not prove the AMD driver is responsible or rule out hardware. An Insider-build regression or driver interaction remains a hypothesis.
nayphethaythxngs, please provide these read-only details:
  1. Press Win + R, enter winver, and report the exact version and build.
  2. Open PowerShell and paste the output of:
    Code:
    Get-CimInstance Win32_VideoController |
      Select-Object Name, DriverVersion, DriverDate |
      Format-List
  3. Check %SystemRoot%\Minidump in File Explorer and report whether recent .dmp files exist. If access is denied, just tell us. Dumps can contain sensitive information, so avoid sharing them publicly without reviewing the privacy implications.
  4. Clarify whether crashes occur during active use, only while idle, or when the display turns off—and whether they occur with Chrome completely closed.
These details will help distinguish a browser-triggered graphics issue from a broader system crash.