Microsoft has confirmed a Windows 11 problem that can cause certain games, media players and productivity applications to close unexpectedly.
The issue appeared after the release of update KB5124010 on 22 September 2026. According to Microsoft, it affects some applications that depend on Windows to decode AC-3 audio, commonly known as Dolby Digital.
For Windows 11 users, the problem can appear in several ways. An affected application might refuse to launch, close without warning or work normally until a particular audio-related feature is used.
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Games and Media Players Can Be Affected
Microsoft says the problem is not limited to one particular application.
Games, media players and certain productivity applications can all be affected if they rely on the relevant Windows audio component.
However, this does not mean every application capable of playing Dolby Digital content will suddenly stop working.
Many modern programs include their own audio decoding technology instead of relying on the built-in Windows decoder. These applications are less likely to experience the problem.
This could explain why one Windows 11 laptop develops the issue while another appears completely unaffected.
Which Windows 11 Versions Are Affected?
Microsoft currently lists Windows 11 versions 24H2, 25H2 and 26H2 among the affected platforms.
The company has traced the problem to KB5124010 and subsequent Windows updates.
This is useful information for anyone whose software began behaving unusually after installing a recent Windows update.
A game suddenly closing does not necessarily mean that the laptop has developed a hardware problem. Similarly, users should not immediately blame their speakers, headphones or sound hardware if the problem appeared following a Windows update.
How Serious Is the Problem?
The impact will depend heavily on the software being used.
A laptop running modern applications with independent audio decoding may never encounter the issue.
Users who depend on older software are potentially more exposed because legacy applications are more likely to use Windows’ built-in audio decoding components.
For gamers, the experience could be particularly confusing. A game may launch correctly and appear stable before closing when it attempts to use an affected audio feature.
Microsoft Is Working on a Fix
Microsoft has acknowledged the problem and says it is working on a resolution for a future Windows update.
That means affected users should keep an eye on Windows Update rather than making unnecessary hardware changes to their laptops.
It is also sensible to check for updates from the developer of the affected application.
For users who have already installed KB5124010 but have experienced no unusual behaviour, there is little reason to panic.
The bug affects specific software configurations rather than every Windows 11 PC.
For anyone experiencing unexplained application crashes after the recent update, however, Dolby Digital audio may now be one of the first things worth investigating.
