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