I've been an avid user of free AVs for many years now. I think I probably started with AVG back in the early/mid 2000's. After that I believe I moved to Avira and then for the past probably 4 or 5 years been using Avast. However, lately I've grown dissatisfied with Avast's UI changes and their slipping detection results and false positives (just check AV-Comparatives and AV-Test.org's results this year). The yearly registration is also a bit of annoyance, especially when installing it on friends/family computers.
So I've decided to jump back to Avira AntiVir Free. After reading that they removed the annoying upgrade popup it was infamous for years ago, and seeing that Avira's detection rates and false positives trump Avast, it seemed like the best choice for a free AV. Avira also hasn't dumbed down their UI like I'm some kind of mobile user; they still give you access to lots of power-user settings. Access to these settings turned me away from such offerings as BitDefender Free and Panda Cloud.
Edited by WhiteZero, 01 May 2014 - 07:55 AM.