I'm running Norton 360 (version 22.23.1.21) on Windows 10. For the last few days, the main Norton 360 dialog (image included here) keeps popping up unbidden. This is happening on two different PCs (when they're idle, though that is cold comfort).
Related and other threads are also watching for an answer: I have already made the Norton team aware of this behavior thus we are all waiting for a response about the cause and a resolution.