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FIX: You cannot play back an H.264 video file or an AAC audio file on a computer that is running Windows Server 2008 R2 with the Desktop Experience feature enabled
Article ID: 2483177 - View products that this article applies to.
When you try to play back a video file or an audio file that is encoded with the H.264 video format or the AAC audio format, playback fails.
Note This problem may be encountered by Windows Media Player, by Windows Internet Explorer 9.0, or by other applications that rely on the Windows Media platform to play media files that use these formats.
This problem occurs because the Desktop Experience feature in Windows Server 2008 R2 does not include decoders for the H.264 and AAC formats.
To resolve this problem, install the Desktop Experience Decoder Update for Windows Server 2008 R2. This update adds the H.264 and AAC decoders to enable playback of these formats.
Update informationThe following file is available for download from the Microsoft Download Center:
Download the Desktop Experience Decoder Update for Windows Server 2008 R2 package now.
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For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
(http://support.microsoft.com/kb/119591/ )How to obtain Microsoft support files from online services
PrerequisitesThe following list contains prerequisites for this update:
For more information about how to enable the Desktop Experience, visit the following Microsoft TechNet website:
Desktop Experience overview
Registry informationTo use the update in this package, you do not have to make any changes to the registry.
Restart informationYou do not have to restart the computer after you apply this update.
Update replacement informationThis update does not replace a previously released update.
File informationThe English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Server 2008 R2 file information notesImportant The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x64-based versions of Windows Server 2008 R2
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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates
Additional file information
Additional file information for Windows Server 2008 R2
Additional files for all supported x64-based versions of Windows Server 2008 R2
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Article ID: 2483177 - Last Review: March 22, 2011 - Revision: 2.0