Fixes a problem in which you cannot play back a video or audio file that uses the H.264 video format or the AAC audio format. This problem occurs on a computer that is running Windows Server 2008 R2 with the Desktop Experience feature enabled.

Fortunately, most sound problems can be fixed by following a series of troubleshooting steps. This article provides a comprehensive guide to resolving audio issues in Windows. The tips are listed in order, so start with the first one, see if that helps, and then continue to the next one if it doesn’t.

Describes update 4055038, including known issues and how to get the update.

System File Checker is a utility in Windows that checks for problems with files on your computer. To run it, follow these steps: Make sure you've installed the latest updates for Windows, and then restart your machine. To find out more, read Update Windows.

Fixes a problem in which you receive a “Could not load file or assembly 'Microsoft.AnalysisServices.AdomdClientUI” error message when a Process Full operation is run in SQL Server.

To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.

Address an issue where ClickOnce applications and applications creating the default AppDomain with a restricted permission set may observe application launch or application runtime failures, or unexpected behaviors.

To obtain the stand-alone package for this update, go to the Microsoft Update Catalog website. This update doesn't replace a previously released update. The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

These errors typically occur when there is a problem with audio or video codecs. For example, C00D11B1 is a common codec-related error. To resolve this, see how to fix outdated or corrupted codecs. This error may occur when there's an issue with the playback of media files.