A future update of the software for Microsoft’s portable media player could come with a DRM that blocks customers from making unauthorized copies of copyrighted video.

Microsoft plans to sell video programming for the Zune, including programs from NBC Universal. NBC apparently has backed the Zune because Apple refused to cooperate with NBC on building filters into its iPod player to remove pirated movies and videos.

Microsoft said it is committed to looking at some form of filtering, although some insiders believe that it may never implement it.

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