Glad to see that as usual Avast scored high....I have been running it for over 4 years and have yet to have a virus get past it. The funny part is that I found out about this product due to standing up a Windows Home Server about 4-5 years ago and at the time it was the only AV that worked with this product....I have to say that I have not been sorry that I turned to Avast for my security needs and always recommend/install Avast on machines that I use, build, service, or fix/maintain. The piddly issue of registration is a no brainer and when yearly re-register occurs it takes about 1 minute to renew without even leaving the AV interface on the PC.
Prior to this great experience I had the misfortune to have been running Norton AV 2005 (what a pig....never again) and ran McAfee for about 1 year when comcast was providing it free....I was not unhappy with McAfee but then Comcast dropped McAfee and I needed to find a solution that included Windows Home Server which as I said lead me to Avast and I have never looked back. Great product.
It is also, the last time I checked, the only AV that Microsoft MSE will co-exist with on the same machine (both running at the same time) for those who are more paranoid than normal behind their firewall routers.