16% Fail Better than 100% Slow with Commercial AV
So 16% of malware gets through if I act like a complete moron. I'd rather take my chances that I'm somewhat more savvy and miss out on the CPU-sucking, RAM hogging, file diverting BS that is most AV software. My PC doubled its speed when I tossed out commercial AV software and let Defender do the basics. That was two years ago and I've only had one virus since then, which Defender caught before any harm was done.