Windows 10 build 18305.1000

Windows 10 version 1903 build 18305 was released on 2018-12-16 to Insiders in the Fast Ring.

New Features

 * A simplified layout for the start menu has been added.
 * Windows Sandbox, a feature allowing you to run windows in a virtual window, has been added.
 * Windows Security improvements.
 * Faster access to symbols and kaomoji.
 * Improved clipboard history.
 * It is now possible to create a password-less Microsoft account. (albeit only on Home editions of Windows)
 * A streamlined Windows Hello PIN reset experience.
 * Windows can now suggest a troubleshooter to run, in case there is a problem.
 * Automatic Restart and Sign On (ARSO) for Enterprises has been added.
 * You can now set a default tab for Task Manager.
 * A new Settings header.
 * "Friendly dates" in File Explorer has been added.
 * More shadows in UWP apps.
 * A re-release of the new Japanese IME.
 * A new "Office" app allowing you to run Microsoft Office programs in it.
 * Improvements to Cortana and Microsoft To-Do.
 * Bugfixes and improvements listed in the official announcement.