Well, it turns out that the installation of Century Link did not automatically delete Comcast from my computer.
Comcast won't be turned off until I take the modem back to their offices. In the meantime, I'm trying to figure out how to get stuff transferred over to gmail. I always say, "Life is difficult for us dumb people!" I'm feeling particularly stupid right now.
I was "creeped out" when I found this message in my comments from yesterday. It seems like "Big Brother" Comcast is keeping tabs on me!