I'm feeling a little vulnerable using just Windows Defender in Windows 10, especially with Sourceforge and others loading crap in free apps. What's a good paid anti virus that won't make my PC run like a sloth? (I have bad memories of Norton slowing down my Pentium 4 back in the day.)
The best anti virus protection is yourself. If you're smart enough to browse the internet, you're smart enough not to go on shady website, not to download every little pop up that says you need to "update' blah blah player 21. Or click on every pop up.
Again, just educate yourself you'll be fine. Anti-Virus protection is the biggest bloatware scam on the market.