This isn't actually for me, but for a friend. I need an antivirus for Windows 10 that's easy to use and doesn't require much user interaction. My main issue is that many antivirus suites collect and sell user data and I'm not sure I want to put that on their computer. Ideally I'm looking for a free antivirus, but if that just doesn't exist than they'd probably want the cheapest option available. I should also say that this antivirus will pretty much be the only thing protecting them, so I need to use something that would protect them from most threats without having to worry about poor detection or behavior blocking.