some sites say avast is good, avg is bad, other sites say avast is bad, avg is good, I don't care about, is 2 years I use avast on 2 pc and never have problems, in case of trojan, malwere or virus I always was notified by avast, and I will never change antivirus. Remember, no antivirus can give you 100% safety on the net, use the one you like, do not let other people decide for you. Did you know what happened two weeks ago with AVG free? the last update found two virus in two windows system files, they were false positive, all the people put FP in quarantine had pc crash, and on the avg site they just said we are sorry was a mistake.