When you try to play Windows Media DRM protected content after you upgrade to Windows Media Player 11 or to Windows Vista, the content does not play. This article contains information about a security component upgrade that may resolve the problem.

This article is intended for a beginning to intermediate computer user.

You may find it easier to follow the steps if you print this article first.

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You may be unable to play content that you previously obtained if the content is protected by using Microsoft Windows Media Digital Rights Manager (DRM). When this problem occurs, you may be directed to a Microsoft Web site. You may experience this problem when either of the following conditions is true:

•	You upgraded from Microsoft Windows Media Player for Windows XP, from Microsoft Windows Media Player 10, or from Microsoft Windows Media Player 9 Series to Microsoft Windows Media Player 11.
•	You upgraded from an earlier version of Microsoft Windows to Windows Vista.

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To resolve this issue, install the security component upgrade by visiting the following Microsoft Web site: If you experience problems with the installation of the security component upgrade, visit the following Microsoft Web site to verify ActiveX functionality:Note If you still have problems, you might want to ask someone for help or contact support. For information about how to contact support, visit the following Microsoft Web site:

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If you still cannot resolve this problem, you may try to download and then play a new piece of content. If you try this method, download the content from a content subscription service to which you currently subscribe. This method should update the system's certificate revocation list (CRL).

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If you cannot play content that you previously obtained, the content provider may not have configured license servers to deliver revocation information to the client application that requests the license. Device key revocation can disable the ability of non-licensed devices to gain access to protected content. For more information about revocation information and about Windows Media Rights Manager, click the following article number to view the article in the Microsoft Knowledge Base:

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