Guys, you have to try a new Norton Internet security 2014 21.0.1.3 version with full Windows 8.1 support. It works flawlessly !!!!! [h=1][/h]
Norton 21 still DOESN'T have Windows 8.1 / RTM / support!!!! It's not recommended to use it on RTM version! Norton 21 Windows 8.1 Preview will be available in a few weeks!!!