When I open Norton 360 the Internet Security is greyed out and says Not set up and Banking Protection is disabled. When clicking on the Set Up Now it takes me to a chrome screen that says "You are now protected online by Norton".
Have you run LiveUpdate manually a few times, restarting as necessary, until no updates are available? Then restart again. Restarting, not shutdown and startup again if you have Windows Fast Startup feature enabled. If you use Windows 8/8.1 or 10 or 11, there can be an issue with the Windows Fast Startup feature.. See more information here.
There is s new version of 360 being released. This may resolve your issue.