Many reasons why I use a free anti virus however I think the biggest reason is . . . . . .
I'm a cheap bastard.
I mean I'm a sucker for why pay for something that you can get free?
Yes the paid for versions are better and have their additional features but I feel like a competent user that only needs basic protection, I would probably recommend a paid for version for my mum or sisters as they're not too tech savvy.