recently, AVG free has been doing better than Avast free in testing.
but if you will use hardened mode (choose hardened/aggressive), then go with Avast.
Are Free antivirus software good ?
Everyone does that these day's.
I installed & uninstalled Avast.
I liked Avast & liked Hardened Mode Aggressive...good protection.
I uninstalled as had bad experience of Avast installing extensions without user input And more importantly I didn't installed extension with custom install But a day later Avast installed Online Shield And a day after Avast installed Safe Price.
Hope you dont experience the same otherwise Avast is good protection & Hardened Mode Aggressive increases protection without much prob for users.
I dont like the ads too...thats your personal preference.