Next version of Windows 10 will support password-free Microsoft accounts. Microsoft will only write a code to your phone number when you log in. It's part of Microsoft's stated goal: "A world without password."
This feature is now available in Insider build 18309. It will be stable and accessible to anyone in the next version of Windows 10, code name 19H1 and available sometime around April 2019. Free-release logins debuted for Windows 10 Home back in Insider build 18305, but is now available on all versions of Windows.
How it works: You can now create a Microsoft account without a password. Instead, just enter your phone number. When you log on to Windows 10 with that phone number, Microsoft will write a code that you enter on the login screen. You can then use Windows Hello to set up a PIN, fingerprint or login method for logging in. You never need to write a password – your account doesn't even have one! And you don't have to enter a code that is sent via text every time you log in, either. You only need to receive a code on your phone when you log on to a new computer.
To use this feature on the latest Insider buildings in Windows, you need a Microsoft account without password:
If you do not already have a passwordless phone number account, you can create one in a mobile app like Word on your iOS or Android device to try it. Simply go to Word and register with your phone number by entering your phone number under "Log in or register for free".
The latest building also has a streamlined PIN recovery experience for Windows Hi and improvements to the narrator.  RELATED: Windows 10's next update will make your computer faster thanks to better spectrum fixes
Image Credit: KC Lemson / Microsoft, Microsoft