Microsoft Confirms Windows 11 KB5124010 Crashes Games and Apps That Use Dolby Digital Audio

Microsoft has confirmed that KB5124010, the September 22, 2026 preview update for Windows 11 , can crash some games, media players, and productivity applications that rely on AC-3 (Dolby Digital) audio decoding. The company added the known issue to the Windows release health dashboard on October 2 and says a fix will ship in a future Windows update. The problem affects Windows 11 versions 26H2, 25H2, and 24H2.