Well, the most secure OS is something that's going to be endlessly arguable, but its probably the most secure Windows considering how people use computers today

Well, the most secure OS is something that's going to be endlessly arguable, but its probably the most secure Windows considering how people use computers today and how many attack surfaces a modern OS has. A lot of security features found in the previously stand-alone EMET are slowly being ported over natively to Win10, for example. It comes with a built-in AV which is pretty good. Smartscreen is unusually good at warning about suspicious executables and I've seen it stop ransomware attacks. VBS makes it harder for hackers to modify system or protected files. Secureboot and bitlocker support are useful in some scenarios. Device guard is supposed to helpful but I'm not sure how it works. Windows hello can replace the traditional password with camera or fingerprint auth cooked-in, which is probably a step in the right direction, although I'd rather see passphrases become more common. Cameras and fingerprints seem gimmmicky and not all my computers have those things.