Years ago my Sister in Law wanted me to look at her laptop that was running slow. She had taken it in to a Mom and Pop computer store after the hard drive died. I noticed that they had 2 AV programs loaded, the laptop ran great after I removed one of the AV programs.
I noticed that when watching the original Star Trek. I just checked wikipedia and the running time on the original series was 50 minutes. The running time on the latest series (Enterprise) was 42 minutes. They just keep shoveling more and more commercials in.
I had a similar situation when I lived in an apartment building. I had TV through dish network using the communal satellite dish on the roof of the building. It seemed like everytime somebody new moved in and got TV through Charter they would unhook the satellite feed into the junction box. Those idiots never bothered to hook the connection back up and I had to have the satellite company that serviced the building reconnect it on multiple occasions.