OK. Let's see. I have no Comcast. I like the suggestion of going to Hulu, ABC etc. etc. I tried one of those 'letters' once and it was fine for the show. Some commercials but not bad. Good warning: make sure I don't have 'to pay'.
I am trying to remember all the observations.

We have separate Cable connections for the TV and the computer. I don't think I have the 'thingadin' that plugs in. I just remember that this computer of mine has 'Ethernet'. I think I asked my Cable company about the card and they said I did not need it because I had Ethernet.
There must be a mistake somewhere when I last tried to program the Media Center. It says it needs the Windows Live Messenger but even when I sign in 'it does not find it'... I will see if I can call the Cable Company.
Thank you for the input and also for helping me remember . I have to try Hulu (I hope that that was the name...