Daily briefing
October 5, 2026
1 stories · about 2 minutes
Windows 11 26H2 feels faster, but an audio bug is crashing some apps
Microsoft's annual Windows update turns on months of speed work for many PCs, but the company has confirmed that a September update can crash apps that use built-in Dolby Digital audio.
- Windows 11 26H2 is an enablement package that switches on features already delivered in monthly updates, including a Low Latency Profile that speeds up menus and app launches.
- Windows Latest and some users report lower RAM use after the update, though results vary by PC.
- Microsoft has confirmed that apps using Windows' built-in AC-3 (Dolby Digital) decoder can crash after the optional KB5124010 update.
- The bug affects 24H2, 25H2 and 26H2. A fix is promised in a future update, with no date yet.
Why it matters: Windows 11 26H2 turns on months of performance work, including faster menus and app launches, and some users report lower RAM use. But Microsoft confirmed that the optional KB5124010 update can crash apps using Windows' built-in Dolby Digital decoder, across 24H2, 25H2 and 26H2. A fix is coming in a future update, with no date yet.
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