Microsoft has fixed a bug in a Windows 11 preview update that caused games and applications to crash when they used AC-3 (Dolby Digital) audio decoding. The problem was introduced with the September 2026 preview update KB5124010, as reported by BleepingComputer.
The crash affected software that relied on AC-3 audio decoding, which is common in games and media apps. Users who installed the preview update experienced instability when playing or processing Dolby Digital audio.
Microsoft has now resolved the issue. The report does not specify whether the fix was delivered via a new update or a rollback, but users are advised to ensure their systems are up to date to avoid the crash.