New Icon - Restart Your Computer to Complete Installation

New icon shows both on desktop and in tasktray at the lower right corner; round, white interior, and picture of what looks like a printer, and caption upon mouse placed onto it says, "Restart your computer to complete installation".  Already existing icon present as usual for Norton 360 Premier Edition; so not understanding why the new, extra icon ALSO for Norton 360, about some new installation.  The upgrade of N360 was already completed a month ago with remote assistance from a Symantec agent.  Should this new icon and its caption be suspicious?

Windows 7, desktop tower-form computer,

Norton 360 Premier, version 21.7.0.11