Old post but want to add a reply in case someone gets here from google 🙂
I ran into this several times. I'm building a VAN and I started the service, then paused, then restarted to do more testing and then paused and so one.
Every time I restart the service I run into the same issue. I go trough the wizard to get online, then will say that I still need to activate, and then ends up saying that the router/dish is already registered in another account. At that point I just restart the router and when it comes back is online.