This article describes an update that fixes an issue that may result in audio playback issues on a certain set of users' computers in Windows 10 Version 1511.
A Conexant Audio Processing Object (APO) fails a signing verification. This causes the system to lose audio functionality.
How to get this update
Windows UpdateThis update will be downloaded and installed automatically.
PrerequisitesThere are no prerequisites for installing this update.
Registry informationTo apply this update, you do not have to make any changes to the registry.
Restart informationYou may be prompted to restart the computer after you apply this update.
Update replacement informationThis update doesn't replace a previously released update.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.