What is the best free anti virus?

I would go Avast or Bitdefender. Malwarebytes is good for extra scanning it does not have automatic detection on the free version of it so be careful about that. AVG is 100% a no go. I work with tons of clients who have AVG and they all hate it and ask me to remove it.

Avast is a good choise but I don't recomend you to use a anti virus it is useless.

first i think is Bitdefender. and and then avast

Why do you not crack an anti-virus ? Crack Kaspersky or for regulars households, use Malwerbytes

Malwarebytes Anti Malware all the way

Well that's my preference anyway https://www.malwarebytes.com/

Honestly, just go to piratesbay and download top seeded choices.

My personal setup is Malwarebytes, bitdefender.

I really don't download random stuff and or visit sites or links that look bad/phishy so i'm fairly confident in what I view/download.
But I also always do a weekly manual full OS scan on all files for that extra measure.

I would not use a free antivirus normally just because of how insecure they can be, Go for something like bitdefender or Trend Micro.

Avast is the best free antivirus https://www.avast.com/

I use AVG Free, Never had any problems with it.. Has live monitoring and all so works great..

I prefer using an operation system that dosnt need anti virus! Linux master race!