wojo - I downloaded gspot, but I have no idea how to use it to analyze what codec is needed. I did see that vob and sub files were highlighted in green and the dvd lists that it has vob and sub files.

Train - I went into WMP and into tools and to files types tab. There I saw that making WMP the default player for dvd had a dark mark over the check mark like it wasn't enabled. I checked that and it was light just like all the other check marks that work. I then went and tried to play the dvd and got the same error message: that WMP player can't open the dvd because there is no dvd decoder.

fink -- yes, I got the numbers wrong. It is version 6 not 9.

Also, when you put a CD in, there is that box that opens on the desk top that provides you with a list of options. There I see an option to play dvds using WM classic. But it doesn't offer me the option of using WMP to play dvds.

So I guesss I can keep playing dvds on WM classic and Cds on WMP -- unles you can tell me what else to do?