I've been believing some other forums that 3rd party antivirus not really needed, unsure how true that is, but since my last Desktop clean install to fix the issue with Missing Internet Temporary file location missing, so far stuck to using Defender--watch me be making a big mistake. Laptop and 3rd Desktop still running Avast Free though--might put this gaming Desktop back on Avast when 19.7 releases to public.
Each Av is never 100 percent protection I do know, try to be as safe surfing as I possibly can be. Has Avast Free been fixed with Windows 10 Pro Sandbox feature if I wanted to use that sometime, or is it best sticking with Defender to avoid that type of conflict. So far only used it to check out a flash drive from a friend that I wasn't sure was infected or not, supposedly Windows 10 Sandbox cannot infect the host machine from what I read so far