I think I know what I was doing wrong. In My Computer > D: Drive > Propoerties > Autoplay, I had set it to ask what to do, but under Music Files. I opened the drop down list, and found Music CD as well, so I selected that, told it to ask each time, and that's done it. I ran that test anyway, Hook, and it all came up as OK.
Now I have another problem. In the list if options, there is an option to Play in MusicMatch Jukebox, which I don't have anymore. Is there any way to get rid of unrequired options from that list?