It's worse when the "poor" connection is because you're in the edge of its coverage area, so you move right next to the router... and it still won't connect, be

It's worse when the "poor" connection is because you're in the edge of its coverage area, so you move right next to the router... and it still won't connect, because it decided that this network was a "poor" connection and memorized that decision. Happened to me a few days ago. Luckily, leaving it alone for a few minutes cured that and it connected.