This is one of the greatest features of a Chromebook. If family/friends have a Google account, they can login and use your system easily. They can't infect it, crash it, or see anything of yours as accounts are heavily secured and partitioned. When they're done, you can remove them with a click. If they don't have a Google account, they can login as a guest. Unlike Windows, guest logins are not a huge security risk on a Chromebook. Plus? They boot in < 10 seconds.

Google Chrome:

With aunts, uncles, cousins
and grandparents on their way,
holidays are the time when
the whole family comes to stay.

Multiple log-ins on Chromebooks
make it easy to share your device,
so your stuff is safe from the naughty
(and even the nice).

Learn more about logging into your #Chromebook: