I was trying to play a .asf file although when I move my mouse over the file on the bottom it shows that it has a .asx extension and when I click it and the dialog box comes up asking if I want to ...

asf is the same as avi plus some headers to allow streaming of the file.<BR><BR>If WMP (you're using Windows Media Player, I presume) doesn't just grab the codec of an asf, then it's probably some ...