I don't run a real-time AV. However, I like to do on-demand (OD) scans at least daily, at night, while I sleep. I presently use Hitman, Herdprotect, & Zemana Antimalware but I still prowl the web for new OD AVs to play with. I found a new OD AV scanner -- "norascan" -- at noralabs dot com, which is home-ported in Belgium. Norascan's GUI is on the short list for "world's ugliest GUI" -- it's very easy to work with, but it's NOT a pretty sight. When not in use, norascan uses zero cpu & zilch ram. I'm keeping it, & shall use it now & then, because ... uh ... I want to. If someone tests norascan out on some nasties (I don't own any nasties myself) I would appreciate to hear what they conclude.