Microsoft has confirmed that a recent Windows 11 update can cause some programs to crash when they play audio. A fix is promised but no date has been given.

• What it is: After installing update KB5124010 (released 22 September 2026), applications that rely on Windows’ built-in AC-3 (Dolby Digital) audio decoder can close unexpectedly or fail to start, often when volume or audio settings are changed.
• Who is affected: Computers running Windows 11 versions 24H2, 25H2 and 26H2. Microsoft says most modern applications should not be affected, but older programs and some games are more likely to be.
• The risk: Lost work and interruptions rather than a security threat. Business software that plays audio alerts or video could be affected.
• What to do: Until a fix is released, avoid audio playback in affected programs or switch off any audio features recently enabled. Microsoft has not yet published a release date for the fix.

If you see applications crashing on Windows 11 devices, contact us and we will help identify whether this update is the cause. We recommend that businesses keep installing security updates as normal while this fix is awaited. Source: Windows Latest.