Today I right clicked on my Norton Security Windows 10 Tray Icon on one of my home network PCs and nothing happened (it worked like it's supposed to yesterday). I contacted Norton Tech support and they removed and reinstalled NS and cleaned a bunch of temp files out, and verified I have the latest graphics driver... and it worked until I rebooted my PC. Now it doesn't work again.
The only thing I can think of that happened between yesterday and today is NS would have installed various updates during that 24 hour period.