Microsoft is taking its disdain for passwords to a new level. It just released a Windows 10 preview for Fast ring Insiders that gives you the option to make all accounts on a particular device "passwordless" when logging into the operating system. Flick a switch in settings (under Accounts -> Sign-in options) and a password won't work at all. You'll have to use Windows Hello face recognition, fingerprint detection, a PIN code or a physical security key to unlock your system. If you don't already have Hello enabled, Microsoft will walk you though it the next time you sign in.