Windows update causes crashes in some legacy apps
Microsoft has acknowledged that the Windows 11 KB5124010 preview update, released in September 2026, is causing certain games and apps that rely on AC-3 audio decoding to crash. While modern apps are mostly unaffected, older or legacy applications using the system's built-in audio features may fail to launch, close unexpectedly, or have issues when certain functions are used. Microsoft is investigating and plans to offer a fix in the future.
- Microsoft confirms crashes after KB5124010 preview update
- Affected are legacy apps using built-in AC-3 decoding
- Modern apps typically include their own audio decoders
- Update installs automatically with 'Get the latest updates' enabled
- Microsoft is working on a resolution, no ETA provided
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