Welcome to the Season of Family Tech Support to those who celebrate.
I found a new one today. I was doing the usual minor cleanup with a relative and I notice a constant stream of pop-up notifications going on. You know how every bloody website now pops up a “would you like notifications from us" window? Turns out that in order to make that window go away this relative was just clicking the convenient OK button, and since we're also now in the Season of Desperate Capitalism every one of the websites they'd visited in the last six months was sending them constant “buy our garbage" notifications.
So yeah, that's something to add to your list to check this year.