I'm not seeing any of these nasties.There is a rectangular advert on the page on the few occasions when I need or choose to look at the programme. But it's not intrusive.
I switched one machine to AVG after it stopped auto-updating Avast ( I couldn't work out why).
But I have no toolbars/popups/adverts and wonder where they are.
Where it is a pain is at boot time. It does delay things. Maybe I'll give Essentials a whirl.
Or one of the others suggested here.
If Avast starts annoying us I'll switch more machines, maybe even to AVG.