Microsoft: Windows KB5124010 update crashes some games and apps
Summary
Microsoft has confirmed that the KB5124010 Windows 11 preview update is causing crashes in some games and applications that utilize AC-3 audio decoding. This issue affects users who have installed the September 2026 preview update.
IFF Assessment
FOE
This update introduces instability and potential system failures for affected users, which is detrimental to system security and user experience.
Defender Context
This incident highlights the importance of thorough testing for Windows updates, especially those impacting core functionalities like audio decoding which could lead to unexpected application failures. Defenders should monitor for user reports and potential workarounds or patches from Microsoft to restore system stability.