Just looking through your post history you make a point of liking adaware because it is completely free, so if you are applying the same standard here you have eliminated all but two options avast! or AVG and as an ex AVG user of a number of years, I have made my decision.

Also ‘best’ is a subjective word and will differ from one user to another dependent on their needs. What ever you choose has to meet your needs. So you the individual have to compare the features of each AV based on your needs and once you select the short-list look at reviews, etc. and then make your choice.

This topic also shouldn’t be on the avast 4 Home/Pro forum as it has absolutely nothing to do with avast 4 Home/Pro. The General forum if it should be discussed at all on the official support forums of avast!