Do I need to pay for antivirus software?

Episode 1556
Kevin fromKevin has an old laptop and wants to know if he needs Webroot antivirus. Leo says that back in the day, Webroot was very good. But lately, If he's able to update to Windows 10, Windows has its own antivirus called Windows Defender which is very good. Before Windows 10, Microsoft had Windows Security Essentials. Both are essentially the same, and they're free.