You know you need a large dose of common sense, to keep your software up to date and that if something seems too good to be true it probably is.
You also know you need decent antivirus software but did you know some of the offerings for home use need to be paid for and some of them can be rather draining for your PC.
Try Sophos Home. It’s great for a family setup as it includes web site filtering and you can monitor its actions on up to 10 machines from an easy to use web console.
OK, maybe this lunch is free but not many are!