Still no real "super winner"...each has pluses and minuses. There are those who use Windows' included firewall and Defender and are happy with them. Others prefer to add one of the 'free' antivirals like Avast (it has a 'paid' version as well).  There are sites like The Top 10   and Tom's Guides  which review software...and express their opinions, but it comes down to what works best on your system and what you can afford. How can you k...