Which Free AV do you think has working Zero-Day Protection? i.e They react at times & not just sit relaxing in GUI doing nothing. Which is quite good/decent according to you?
Dont add Comodo here, its ahead of times 
I find …
Free AVG’s Identity Protection which is its Behaviour Blocker quite good. It reacts & reacts quite a good times.
Free Rising’s Trojan Defense which is its Behaviour Blocker is decent but gives False Positives at times.
Free Avast’s Behaviour Shield at its current state is not protective & thus does nothing. AutoSandbox reacts quite a decent times.
Free UnThreat - Behaviour Blocker does nothing.
Free MSE - Behaviour Blocker does nothing.
Note - Does nothing & never reacts means atleast in my tests they did nothing, never reacted.
I think AVG has quite a good Behaviour Blocker for Zero-Day protection among Free AV’s?
Whats your opinion?
Regards
Naren