FIX: Playback of DRM on Vista requires WDDM video driver


Playing protected video content in Windows Media Player on Windows Vista requires an Windows Display Driver Model (WDDM) video driver.
In Windows Vista, Windows Media Player always uses Media Foundation to play protected video content. Media Foundation requires a WDDM video driver to play protected content. Other applications may use the Windows Media Format SDK (WMFSDK) runtime to play protected content. The WMFSDK runtime does not have the same WDDM requirement as Media Foundation.


Hotfix Information

Download information

Windows Vista for x86-based computers (all languages)

The following files are available for download from the Microsoft Download Center:

Download Download the Windows6.0-KB939208-v2-x86.msu package now.

Windows Vista for x64-based computers (all languages)

Download Download the Windows6.0-KB939208-v2-x64.msu package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
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The global version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.


Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.

More Information

This hotfix removes the Media Foundation requirement of using a WDDM driver for protected content playback.

Typically video cards that do not support Aero Glass use Windows XP Display Driver Model (XDDM) drivers. If the video card does not support Aero Glass, it is a good indication that Windows Media Player would not play protected content.

Id. de artículo: 939208 - Última revisión: - Revisión: 1