honestly, if you check and monitor your own habits and don't take major risks with your internet searches and dowloading dubious files willy-nilly, Windows Defender's latest versions are pretty good by themselves and are bundled with Win10 and the major updates.
Honestly I haven't had an anti-virus on my computer for the past couple years (again, apart from Windows Defender) and I have had 0 problems so far. Just have to be responsible while surfing and make sure I dont click on ads and so forth