Microsoft has confirmed a new bug in the Windows 11 update labeled **KB5124010**, which was released on September 22. This update is part of the regular September security and feature updates for Windows 11. Some games and software may unexpectedly close when they use the system’s built-in Dolby Digital audio decoder. This issue affects applications that rely on the Windows Dolby Digital decoder to process AC-3 audio, a common format used in movies and games. The September updates have already faced several problems, including issues with Remote Desktop, USB audio, and file sharing with Linux virtual machines. Now, Microsoft has identified a new problem related to the handling of AC-3 audio in **KB5124010**. This affects games, multimedia players, and some productivity software. The issue arises because not all Windows applications decode AC-3 or Dolby Digital in the same way. Newer applications typically include their own decoder, while older ones rely on the built-in Windows components. In the latter case, **KB5124010** can cause crashes, depending on how the application requests the decoder. These crashes may occur either when launching the application or only when playing audio content. Microsoft has estimated that older software is more likely to be affected, but it has not named any specific programs or provided exact data on how many users are impacted. A fix is currently being prepared, though no precise release date has been announced. For now, Microsoft does not offer any temporary workaround for the issue. Earlier this month, audio-related problems were also reported after the September Patch Tuesday update, but those were linked to USB Audio Class 1.0 devices, which caused sound issues or error Code 10 in the Device Manager. If the bug is preventing you from using a particular game or software, you can choose to uninstall **KB5124010** until a fix is available. Since this update is optional and does not include critical security patches, uninstalling it poses little risk. To do this, go to Settings > Windows Update > Update History > Uninstall Updates, then find **KB5124010** in the list and uninstall it. If this fails through the Settings menu, you can use the Command Prompt as an administrator. Run the command DISM /Online /Get-Packages, locate the package name for **KB5124010**, and then execute DISM /Online /Remove-Package /PackageName:<full_name_of_the_package>. Restart your PC to complete the uninstallation.