Hey reporter...
I have windows XP with SP-1, with windows player 9 and it absolutely refused to play on my computer. I kept getting an error message saying that: Windows Media Player cannot play the file because the specified protocol is not supported. In the Open URL dialog, try opening the file using a different transport protocol (for example, "http:" or "rtsp:" Well it just would not work no matter what I typed in or did. I also tried using my other players that I know support .asf files and they wouldn't run it either. Very odd indeed. But, yet it would run no problem on my husbands laptop which has windows 2000 professional, and media player 7. Go figure....
bw