New
#1
Looks valid to me.
Windows will push upgrades on you and that is nothing to worry about.
To be safe I'd suggest you pick "Remind me tomorrow" and then manually restart. If you then get the "Upgrade and Restart" option like the picture below then do it.
It looks like this:
You can read more about updates here (which is where I took the picture of @Kari from) Win 10 Ann Ed - - Page 2 - Windows 10 Forums
Honestly though don't worry - your phone and TV do it too.