New suspicious icon forcing reboot

Please, help me to identify whether it is really Norton asking me to install something and reboot. I have now two Norton icons in the low right corner of my desktop (Win 8.1). One of them is traditional Norton icon, another seems suspicious - it doesn't identify itself as Norton but has similar design, the only options it suggests when I right click on it: open, reboot now, reboot later. Does anyone recognize this as new Norton feature or is it virus or anything that bad?

I am really afraid to try and reboot as this icon suggests because recently several of my e-mail accounts were hijacked and I wonder whether it is continuation of the attack or just simple Norton update.

Here are the screens of the icon, my computer is in Russian, but above I translated what the icon says. The big screen says only that urgent reboot is needed.