Kaspersky AV is my best choice because best P/P. Less than 8$/1PC/1 year or less than 15$/3PC/1 year in my country.
It's common sense and Windows defender for me. I do, however, run Malwarebytes AM once in awhile, just to be sure. Never had a virus (but had an instance where I was cleaning a friends laptop and found over 2,000 PUP and 4 trojans)
avira is useless lol why is it in that top even wind defender + MS essential is better than that, never stopped anything on my pc, avast/malwarebytes/ bitdefender always stop all sorts of s**t going trought my web browser/torrents and random downloads while avira does nothing its like placebo AV...
I'm using Avira Free since good old Windows 95 times and I never ever had any issues with virusses on my system, but I don't use the default config.