I've been using
AVG Free Advisor - AVG Anti-Virus Free Edition for years and I don't get daily pop up ads.
What does happen every single day at the same time is something that is great. It checks for an update. If there is one, it updates automatically. It might take a minute or so, but it is worth it because of the importance. On days when there is no updates there is only a second or two are used and I hardly notice.