Windows KB5124010 Preview Update Causes Crashes in AC-3 Audio-Dependent Applications
Microsoft identifies compatibility issue affecting games and apps using Dolby Digital audio decoding on Windows 11
Key Takeaways
- KB5124010 preview update for Windows 11 causes crashes in apps and games using AC-3 (Dolby Digital) audio decoding.
- The issue is a compatibility/stability problem, not an actively exploited security vulnerability.
- Microsoft is actively working on a fix; temporary workarounds include uninstalling the update or reverting to a previous build.
- Affected users should monitor Microsoft release notes for the official patch.
Quick answers
- What happened?
- Microsoft has confirmed that the Windows 11 KB5124010 preview update, released over the weekend, causes crashes in some games and applications that rely on AC-3 (Dolby Digital) audio decoding. The issue stems from changes in the update affecting audio processing and is currently being addressed by the vendor.
- Which products are affected?
- Windows 11
- What should defenders do?
- Users experiencing crashes should uninstall the KB5124010 update via Windows Update settings or use System Restore to revert to a previous build. Microsoft is working on a permanent fix and recommends monitoring official release notes.
Microsoft confirmed over the weekend that some games and applications using AC-3 (Dolby Digital) audio decoding will crash after installing the September 2026 KB5124010 Windows 11 preview update. The issue affects systems running the preview build and results in application instability rather than a security exploit. Microsoft is aware of the issue and is working on a fix. Users experiencing crashes can uninstall the KB5124010 update temporarily or revert to a previous build until a permanent patch is released. No active exploitation has been reported; the crashes are stability issues caused by the update. The advisory was initially reported by BleepingComputer on 2026-10-05.
Security Details
The KB5124010 preview update introduces changes to audio processing that conflict with AC-3 (Dolby Digital) decoding, causing crashes in affected games and applications. No security vulnerability or active exploitation is involved; the issue is a quality and compatibility bug.
Affected products
Windows 11
Mitigation
Users experiencing crashes should uninstall the KB5124010 update via Windows Update settings or use System Restore to revert to a previous build. Microsoft is working on a permanent fix and recommends monitoring official release notes.
Sources
BleepingComputer
Microsoft: Windows KB5124010 update crashes some games and apps
Oct 5, 2026 · 09:37
Original link
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