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Windows Media Player 11 may be temporarily unresponsive when you play a video file in Windows Vista
Describes a problem that occurs when you play a very large MPEG2 file in Windows Media Player 11.
Resources for troubleshooting issues in Windows Media Player
This article provides reference points for information about how to troubleshoot the problems that may occur when you play media in Windows Media Player.
Play a CD or DVD in Windows Media Player
Learn how to play the contents of a CD or DVD disc and about the DVD decoder required for DVD playback.
Codecs: frequently asked questions
Find answers to common questions about codecs and DVD decoders in Windows Media Player.
Windows Media Player error C00D1199 - Microsoft Home Page ...
Make sure the file type is supported by the Player. For a list of file types (formats) that are supported by Windows Media Player, see the "Supported file types ...