Windows Media Player 11 won't play files with mp4 extension even when the appropriate codec is installed

Isaac Lightgiver asked on


my windows media player just wont play anything that has a mp4 extension, it keeps saying "Windows Media Player cannot play the file. The Player might not support the file type or might not support the codec that was used to compress the file."

but if i rename the extension to any other extension for example m4v, the videos plays normally, but if i change it back to mp4 it gives the error message back,


anyone knows the solution for this problem



PS: replies no.2 and no.4 for more details

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Isaac Lightgiver replied on

nevermind, i solved it by myself already



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