Symptoms
A web page have a media file streaming using windows media server, the video only have sound but no video. The Windows Media Player 11 won’t start up on its own.
Solution
Run Command Prompt as Administrator
and run the following commands
regsvr32 jscript.dll
regsvr32 vbscript.dll
Conclusion
…
Extend
There is also a windows media player plug in for MAC OSX provide by Microsoft
http://windows.microsoft.com/en-US/windows/downloads/windows-media-player