Do u need more replies... There is no contest here. One contestant only. Avast... no doubt. Others r runners-down
I've been using it for...... @least 5 years... great record it maintained... the team just gets better and better...
I hate other antiviruses as they are resource-hungry. Avast takes really low memory resources... so ur computer starts faster and performs better when u have avast, unlike Norton... which is just a waste of space. Mcafee too sucks. BitDefender is a good one. Kapersky, AVG, QuickHeal, Pccillin are runners-up. Mind u, i tried all of them. So take my word and go the AVAST way!
But the best free antiviral solution is, without any doubt, AVAST. They update regularly too...