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Microsoft: Windows KB5124010 update crashes some games and apps

October 5, 2026 · BleepingComputer · Severity: MEDIUM

This article reports that Microsoft's KB5124010 Windows 11 preview update causes crashes in games and applications that use AC-3 Dolby Digital audio decoding. Microsoft confirmed the issue over the weekend, and users are advised to uninstall the update if affected. 📌 **Analyst Note:** This bug highlights the risk of preview updates impacting critical multimedia functionality; organizations should test preview updates in isolated environments before broad deployment.

Key Takeaways

  • Microsoft confirmed that the September 2026 KB5124010 Windows 11 preview update causes crashes in games and applications using AC-3 Dolby Digital audio decoding.
  • Users who installed the update may experience instability when launching applications that rely on Dolby Digital audio codecs, requiring a temporary workaround.
  • Microsoft has not yet released a fix, so affected users should consider uninstalling the update or waiting for an official patch to restore functionality.
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