Last updated: September 21, 2026
If your Windows 11 gaming PC started behaving strangely after a recent update, you are not necessarily imagining it.
Microsoft’s September 2026 Windows updates introduced several problems on some systems. While Microsoft has already released an emergency update to address a number of the reported issues, some problems, including reported AMD Radeon graphics crashes, remain separate.
So before you start reinstalling games, changing BIOS settings or blaming your graphics card, here’s what you should check.
What happened with the September 2026 Windows 11 update?
Microsoft released its regular September security update on September 8, 2026. The update brought security fixes and several changes to Windows 11.
However, some users subsequently reported problems including Remote Desktop failures, USB audio issues, problems with Hyper-V shared folders and other system-related bugs.
Some AMD Radeon users also reported crashes, freezes, black screens and driver-related problems after installing the September update. These reports have received attention from several technology publications.
That does not mean every gaming PC is affected.
If your games are running normally, there is no reason to assume your PC has a problem simply because you installed the September update.
Read on to know Gaming PC Build Under $1000 (Ultimate Guide 2026).
Is the Windows 11 update causing game crashes?
It can be difficult to answer this with a simple yes or no.
A game crash can have many causes:
– Windows updates
– GPU drivers
– Game updates
– Corrupted game files
– Overheating
– Overclocking
– Background applications
– Anti-cheat software
– DirectX problems
– Hardware instability
The important thing is to look at when the problem started.
If your game worked normally for weeks and suddenly began crashing immediately after a Windows update, the update becomes one possible cause worth investigating.
AMD Radeon users should pay particular attention
Reports following the September update have included AMD Radeon systems experiencing crashes, freezes, black screens and display-related problems.
However, Microsoft’s emergency KB5129195 update does not list a fix for these reported Radeon problems. In other words, installing KB5129195 should not be presented as a guaranteed solution for an AMD GPU crash.
If you have an AMD graphics card and your gaming problems began after the September update, check your Windows build and AMD graphics driver before making major changes to your system.
First: check your Windows 11 version
You can quickly check your Windows version and build number.
1. Press Windows + I.
2. Open System.
3. Select About.
4. Look under Windows specifications.
5. Check the OS build.
The emergency Windows 11 update KB5129195 moves:
– Windows 11 24H2 to Build 26100.9457
– Windows 11 25H2 to Build 26200.9457
These build numbers can help you determine whether the emergency update has already been installed.
What is KB5129195?
KB5129195 is an emergency, out-of-band Windows 11 update released after Microsoft identified problems associated with the September update.
It addresses several issues, including problems involving:
– Remote Desktop Services
– Hyper-V/Plan 9 shared folders
– Certain USB Audio Class 1.0 configurations
It also contains an additional security fix.
Microsoft distributes Windows updates through Windows Update, although availability can vary by system.
Should you install KB5129195?
If Windows Update is offering KB5129195, installing it brings the documented fixes and security improvements included in the emergency release.
However, gamers should understand one important point:
It is not a universal fix for every problem introduced or reported after the September update.
In particular, reported AMD Radeon crashes are not listed among the problems fixed by KB5129195.
So if you install the emergency update and your Radeon-related gaming problem continues, don’t assume the installation failed.
What should gamers do if a game keeps crashing?
Before doing anything drastic, work through these checks.
1. Restart the PC
It sounds obvious, but do this first.
Windows updates sometimes require a restart before all system components and drivers are fully loaded.
2. Check Windows Update
Go to:
Settings → Windows Update
Check whether additional updates are available.
Microsoft recommends keeping Windows updated, while also allowing users to schedule restarts around their active hours.
3. Check your GPU driver
If you use an AMD Radeon, NVIDIA GeForce or Intel Arc GPU, check whether your graphics driver is current.
Do not automatically assume that the newest driver is always the answer, though. If the problem started immediately after a driver update, the driver itself may be worth investigating.
4. Verify the game files
If only one game is crashing, the Windows update may not be the actual culprit.
Use the game launcher’s file verification feature.
For example, Steam provides an option to verify the integrity of installed game files.
5. Turn off overclocking temporarily
If you have overclocked your CPU, GPU or RAM, temporarily return the hardware to its default settings.
A system that was stable before can sometimes become unstable after a driver or Windows change.
6. Watch for a pattern
Try to identify exactly what happens.
Does the game:
– Crash immediately?
– Freeze after several minutes?
– Show a black screen?
– Return to the desktop?
– Restart the PC?
– Produce a driver timeout?
– Crash only when entering a particular area?
– Crash only with ray tracing enabled?
The answer can help narrow down the problem considerably.
Should you uninstall the Windows update?
Don’t immediately uninstall a security update just because a game crashes.
First establish whether Windows is actually responsible.
If your PC has become unusable or a newly installed update clearly corresponds with a serious system problem, Windows provides recovery options that can be considered.
Before removing an update, however, make sure you have important files backed up.
And remember that removing a security update can leave your PC without fixes that were included in it.
A simple way to troubleshoot the problem
Here’s the approach I’d use:
Game suddenly crashes → check Windows update date → check GPU driver → check other games → verify game files → check temperatures → remove overclock → investigate Windows update only if the timing matches.
This is much safer than immediately reinstalling Windows.
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What if everything is working normally?
Then don’t panic.
A Windows update causing problems for some configurations does not mean every Windows 11 gaming PC is affected.
If your games are running normally, your GPU is behaving normally and Windows is stable, there is no need to start changing system settings simply because you’ve read about someone else’s problem.
Bottom line
The September 2026 Windows 11 update cycle has caused several documented problems on some systems, and an emergency update, KB5129195, has already been released to address a number of them.
For gamers, the important distinction is that not every reported problem has been fixed by KB5129195. Reported AMD Radeon crashes and freezes remain an area to watch.
If your gaming PC suddenly started crashing after the September update, check your Windows build first, then look at your GPU driver and the timing of the problem.
And before blaming your graphics card, remember one simple rule:
Change one thing at a time.
That makes troubleshooting much easier.
