First off: I would never take my PC to geek squad. They have the worse service ever and knowledge base. My roommate had a rootkit on her laptop that was trying to take down my network, and so she flipped out and took it to Geek Squad. They told her that was perfectly normal for her computer to do that. Even after I showed them my firewall logs from my file server. They charged her $75 for nothing. So one quick bit of info, we can help you here at computer forums with anything.
2nd Thing: Norton is, I think, one of the worst virus programs in the world along with McAfee. I think a lot of us here like AVG, Comodo Internet Security, or Avira. All free and great alternatives. If you don't trust the free stuff, Kaspersky is pretty good too. Also, not every virus program will catch every virus. So like me, I run Comodo Internet Security and Malwarebytes. Some people think that is overboard, but I am very secure and haven't been infected in years.
3rd thing: If you backed up your files to a USB drive, I would hop into a linux distro like ubuntu and search through your files and make sure the virus didn't jump on there. This could happen with any virus out there. To tell if it is a virus, just look for any out of the ordinary files. If you find one delete. You must do this in a linux distro just because the virus is probably design to run in Windows so you can't see it. If you are unforsure if it is good or bad. Just ask us here.
4th thing: Run Malwarebytes. It is free and dependable. If it doesn't find anything and your still having the issue, I think you would probably be better off with a reformat. Reformat guarantees the virus is gone.
Sorry I seem like I was preaching, but I want the best for people out there. And like I said multiple times, if you have a question about something, just ask us here.