Free antivirus software tends to be aimed/marketed at administer level computer geeks. I don't trust myself to be that competent to tweak my own settings in order to maximize the programs level of security.
So paid protection will have to do. Let the professionals keep my program optimized and tweaked.
The Caine Mutiny (1954) with Humphrey Bogart or Mutiny on the Bounty (1962) with Marlon Brando?