At the time, I purchased for him a Intellinet DSL/CABLE Modem Router and thought it would be a piece of cake networking the two. I have done this before on several occassions at home with the PC's I have there and never ran into any problems. I have always used a Linksys router and it's been so easy - just plug the PC's into the ports and they work.
Well, that's not the case here. I can connect either the desktop PC or laptop via the router and get an Internet connection for one of them, but not for both. He told me he had a guy (his lingo for a "techie") come out and take a look at both computers. This guy told him that the desktop PC was not set up to share a network connection with another computer. This was a couple of months ago. I just found out that the guy did come and talk to him, but never came back to do the work needed to get this network set up because he went out of business (hmm, go figure).
Anyway, so it's back on my shoulders to try and get this up and running properly. If anyone has expertise with this process, I'd sure like to hear from you. I'm only at the father-in-law's house every other week or so, so it may take some time, but I do want to get this working for him.