8. "Windows Defender + Malwarebytes and you're good" In response to Reply # 0
most AVs are decent nowadays. you just need to make sure you don't get one that will bog down your system resources (norton is/was notorious, but i havent used it in at least a decade). I like Trend Micro, i've heard good things about Bit Defender.
i'm good with the Windows Defender (already built into Windows 7/10) and Malwarebytes combo for my home PCs. for Malwarebytes i do pay the subscription because i like the real-time scanning feature. i have a raspberry pi running DNS (Pi-Hole) at home too where i subscribe to various blacklists feeds so i'm not hitting known bad sites.
9. "Depends if you want to be "safe" or safe." In response to Reply # 0
Most AV scanners are much of a muchness these days - I manage a McAfee EPO infrastructure for a large financial org and they've always had definitions added by the end of Day Zero of any exploit... best you can hope for really. Far as I can see Kaspersky and most of the other big names manage the same, so they'll all offer more-or-less the same protection from viruses (i.e. you'll be protected after about 4 or 5 hours of an attack being in the wild).... which is something, but isn't a huge amount given the potential speed an exploit can spread these days.
If you want to *actually* be secure, you're better moving away from blacklist products like traditional AV (Blacklist i.e. it holds a list of known viruses, blocks them and allows everything else) towards Whitelisting products like Bit9 Defender which learn your machine's usual behaviour then block everything else. Better for servers than workstations really - for your home PC I'd suggest a decent AV scanner, a decent software firewall and, most importantly, a strict regime of not acting like a dickhead on the Internet.