Deborah has a wireless internet connection, but she frequently gets disconnected even though it appears that she has strong signal. She looked in her network connections and she sees one that is getting a lot of her bandwidth. Leo says that in congested neighborhoods, it's possible that someone is leaching off her Wi-Fi access point. It could be dozens of things, though.
Leo says it's best to get a Wi-Fi expert. It's not something that can be troubleshooted over the phone. She can check with the chatroom here and contact her local computer shop to see if they have a Wi-Fi analyzer that they can use to solve the problem.