I've recently been seeing ads on some web pages where they have never been before. The addresses are listed in the HOSTS file, so I'm wondering what has changed / what action should I take? Two that I have checked are "googleads.g.doubleclick dot net, and adclick.g.doubleclick.

I have the October 2018 HOSTS file installed.

If they are in my custom host file, why are they loading?

Thanks for the help.