Norton Download Manager Error - Already Running; "Using Comcast" Norton

So I am trying to reinstall Norton on my laptop again and for some reason, whenever I attempt to run the download manager so that I can get Norton, there is a popup that says "Another download manager is currently running. Please wait for it to complete and try again." My first thought was to look at all users' processes, and to my surprise, nothing came up for another download manager. In my puzzled confusion, I looked up methods to install Norton without having to use the Download Manager, but they did not work for people who obtain Norton through Comcast; they all required a valid subscription before use. I am currently just playing it safe and in hopes of nothing actually happening. I know how to keep my computer safe, but other family members of mine use it from time to time and they run virus scans after they use it. My only concern as of right now is that someone will be paranoid that there is a virus on my computer. Can anyone please help me out?