Just within the week, my Norton Security System Tray icon does Not respond to clicks. In order to do Manual Liveupdates or check other settings, I have to double click on the Desktop icon. Used to be able to Right-click and choose Liveupdate. The icon is There. Run over it with the mouse and it says "Norton Security", but NOTHING else happens. Double click it. Nothing.
I believe that I have done a re-boot already, but, will try again. Task Manager shows a nsbu.exe for SYSTEM and another for my User name. Liveupdate, After clicking on the Desktop icon, Does work.