Best Free Anti-virus Software

Not sure if this is the most appropriate forum, but I was wondering if anyone can recommend a decent freeware anti-virus software.

Been using Avast and was told there are better alternatives...

This thread sucks. I will use it to recite more of my poetry.

Beware! A dangerous rogue
He stole my new POG
He crashed my phone
He beat up all my pokémon

He met Russian mafiosi
They asked, son, are you down?
They asked, son, can it be done?
He just took it easy.

Five computers at is place
Possess each a thousand more
They said, son, that's ace.
They asked, son, what else in store?
Polymorphism, here begins the arms race
DDOS, enemies won't be up anymore.
Gay porn, let's plant some disgrace.
Bank accounts, something to explore.
SETI, let's find them in space.
Deleting stuff, maybe that's uncalled for.

I punched him in the face.
He was not that hardcore.