Hi! I'm new to these forums.
What is the most unobtrusive antivirus that runs on Windows 10? My dad is insistent that Windows Defender does not do a good job keeping Windows secure. I am new to Windows (I have lots of experience with OS X and the Mac), so I'm not really used to having to run 3rd-party software like that, and I don't feel comfortable downloading a program from a website (because on my Mac I got everything from the App Store) and I worry about the security of that.
I'm sorry if I'm not being very clear with my questions. If you want me to go into more detail on anything, please ask.
I would go for Antivirus from Avira. Unobtrusive, high detection rate and doesn't cost the world. There is also a free version available.