Update:
I couldn't get online since Saturday morning. My computer said the wireless connection was excellent...all other stuff checked out as far as I knew, but it wouldn't pull up any web pages.
I was finally in the right mood to call tech support. They were friendly and helpful, and in the end decided to send a tech. I agreed to "between 3:30 and 6:00" since I could be home from mom and dad's by then. Dude showed up like 3:35, replaced the router (said the other one was pretty old, this one has a separate modem and the router box is much smaller) and the converter (said the one plugged directly into the back sucked and gave me one on a wire that I can hang somewhere) and it is now running GREAT. No additional cost to me. He wouldn't even let me tip him though I said he deserved something for coming out on a Sunday.
I should have done this a long time ago, but like I said, I didn't want to call when I was in a pissy mood, and it HAD been working off and on and...I'm a procrastinator.