Jeff wants to know why his internet slows down at night. Leo says that he ends up sharing bandwidth with his neighborhood and if it's slowing down in the evening, it's because everyone is on Netflix. He also has to factor in Wi-Fi congestion. Jeff could bypass the Wi-Fi router and plug directly into the modem and see if it speeds up. If it does, then he'll know it's Wi-Fi congestion. If not, then he'll know it's his because of heavy use in the neighborhood.
Steve's Dell Inspiron laptop drops Wi-Fi all the time. Dell claims to have fixed it via remote access, but it didn't work. Leo says that it's likely the person at Dell tech support had very little training and was following the directions in the notebook. All too often it doesn't fix the problem. What he'll need to do is call them back and ask to have his case escalated to tier 2 or even tier 3 level support.