Why need restart after liveupdate

Previously I always had bought Norton 360, and I  remember it was not necessary to reboot aftre each live update

 

Now I just installed norton internet security, and after doing live update, it asks me for reboot.

 

MY god, i am sure live update will have new updates daily, and you after turn on my computer, loading every thing, then I need to reboot again ? What stupid changes did you make to this software?????