I use AVG internet security, VPN & Tune Up.
I'm not a fan of TUNE but my wife like to run it every 2nd day so we have it. The VPN works really well as does the Internet Security part. It's not expensive and works away quietly.
Having AVG scan as a download is in transit as well as checking USB devices etc is also a plus.
Tune Up's BIG plus is isolating programs that are rarely used &/or when in the back ground use a lot of CPU...it offers the option of putting them in "sleep" mode so they have to be clicked on to "wake up' end be used or removal.