Disconnected

The only thing more annoying than being on antibiotics that you absolutely cannot drink any alcohol with (that would be me for the next week or so...) is my wireless internet connection sucking mad donkey balls. It has always been terrible, but acceptable in a dial-up throw back kind of way. Now with the heat (even with AC it's hot here) and maybe the router dying, I can't do much at all. I guess that's for the best as I was trying to take things easy and not get riled up.

Anyways, all you computer smarties out there here is my issue and I would love some ideas on what is best to do:
-Mother in law has a Mac computer and the in-law apartment is diagonal across from my den where my computer is
-When Comcast installed the wireless the inept guy had no idea how to handle a Mac, so we had to allow the MIL to have the direct connect while I got stuck with the wireless
-It does not work at all, sucks
-Offer best ideas to get a new setup, I was leaning towards hiring GeekSquad but it gets complicated with the Comcast hardware I think. Maybe I am wrong, please advise.

Have a good night.