FWIW, I asked my company’s IT guy what he uses, and he recommended one called Vipre. I’ve been using it for three years or so and have no complaints and no viruses or malware.
I had to get something else after becoming totally frustrated with McAfee, which allowed a virus to infect my XP machine (this was back in 2008) for which there was no “antidote” and no repair possible; the machine was basically bricked.
The machine I replaced it (an IBM Think Pad) had Avast pre-loaded. It wasn’t bad, but I didn’t like it that much. Unfortunately, I can’t remember exactly what it was that bothered me about it, because I upgraded to Vipre when I got my next laptop, and have since added it to my tower.
As always, YMMV. Vipre is (I think) about $90 for two years
for a license that will protect up to (IIRC) ten computers on a home network. In my house we have six.
Oh, I remember one thing that bothered me a little. Avast is headquartered in Prague, Czech Republic.
GFI Software, the company that makes Vipre, is headquartered in Durham, North Carolina.