Windows 11 / Intelligence workspace
Snapshot · 2026-10-25
IssuesKB5124010Evidence
Windows update intelligence

Applications requiring AC-3 audio decoding may close unexpectedly

Legacy applications that decode AC-3 audio may close unexpectedly after the September 2026 preview.

ResolvedC3 · Microsoft confirmedMajor impactSnapshot checked 2026-10-25

Does this match your environment?

Windows scope
24H2 / 25H2 / 26H2
Architecture
Unknown — not universal
App / driver
Legacy AC-3 applications
Conditions
Legacy applications decoding AC-3 audio; Microsoft states many modern applications are unlikely to be affected.

A matching version is only a starting point. This page does not diagnose an individual device.

Evidence & current resolution

Microsoft lists this scope as resolved on 2026-10-13. Resolving update: KB5127648.

Microsoft official evidence
Evidence ID
official-ac3-audio-apps
Source groups
1 · official publication
Evidence basis
Manually reviewed public source; no independent device test
Evidence permalink

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Recorded timeline

2026-09-22

Originating update released

KB5124010
2026-10-13

Official resolution recorded

KB5127648

2026-10-25

Snapshot reviewed

Added to this curated collection. Earlier acknowledgement time was not independently captured.

Follow official guidance for your environment. We do not provide automatic rollback or security-disable actions.