Had AVG on various pc`s for years.....until a virus got past it and ruined my HDD, - (coudnt even format or re-install os without crashing. had to buy new Hd) Then I ran Comodo from new HD,
.it found virus on old HD and removed it making it usable again. AFAIAC - Comodo rocks!! Norton is a glutton & hard to uninstal completely. AVG used to be good but now u/s,
Kaspersky seems to me best for Android. .........wish there was a COMODO version though!!