Microsoft confirms Windows update causes crashes in games and apps

Why does the KB5124010 update trigger audio-related crashes?

Microsoft confirmed over the weekend that certain games and applications relying on AC-3 (Dolby Digital) audio decoding crash after installing the September 2026 KB5124010 Windows 11 preview update. The issue affects users who installed the optional update released for testing purposes. Reports indicate the problem occurs specifically when these applications attempt to process audio streams using the Dolby Digital codec. Microsoft acknowledged the problem through its official support channels, stating it is investigating the root cause. The update was made available to Windows Insiders in the Dev and Beta channels as part of routine preview testing. Affected software includes various media players and gaming titles that depend on legacy audio decoding components. Users experiencing crashes are advised to uninstall the update temporarily while a fix is developed. Microsoft has not yet provided a timeline for when a resolved version will be released.

The company emphasized that the update remains optional and does not affect systems running stable Windows 11 builds.

What steps should users take if they encounter this issue?

The KB5124010 update modifies core audio handling components in Windows 11, particularly those involved in processing compressed audio formats like AC-3. These changes inadvertently interfere with how certain applications interface with the Dolby Digital decoding pipeline, leading to instability. Microsoft engineers suspect a conflict between updated system DLLs and legacy audio plugins used by older software. The issue does not affect all applications, only those that rely on specific outdated audio codecs or third-party audio filters. Testing revealed that the crash occurs consistently when launching affected programs and attempting to play media with AC-3 audio tracks. Microsoft is working with audio technology partners to isolate the exact point of failure in the audio stack. The problem appears to be limited to the preview update channel and has not been observed in cumulative updates for the general public.

Users who experience crashes after installing KB5124010 should first verify whether the update is installed via Settings > Windows Update > Update history. If confirmed, they can uninstall the update through the same menu under „Uninstall updates.”Microsoft recommends temporarily pausing preview updates until a fix is issued to avoid recurrence. For users who rely on affected applications daily, rolling back to the previous stable build is the most reliable workaround. The company has not issued a formal mitigation guide but confirmed that uninstalling the update resolves the crash in all reported cases. Affected users are encouraged to submit diagnostic logs through the Feedback Hub to assist in troubleshooting. Microsoft reiterated that stable Windows 11 releases remain unaffected by this issue. No data loss or system corruption has been linked to the crashes so far.

Is the KB5124010 update mandatory for Windows 11 users? No, KB5124010 is an optional preview update released only to Windows Insider program participants in the Dev and Beta channels. It is not pushed to general consumers through Windows Update.

Frequently Asked Questions

Will reinstalling the update after uninstalling cause the same crash? Yes, reinstalling KB5124010 without a fix from Microsoft will likely result in the same crashes occurring with affected games and applications. Users should wait for an updated version before reapplying the preview build.

Are there any known fixes or patches currently available? As of now, Microsoft has not released a patch or updated version of KB5124010 to resolve the audio decoding crash. The company is actively investigating and expects to address the issue in a future preview update.