Windows 10 build 10051

Windows 10 build 10051 is a build of Windows 10 that was shared online on 5 April 2015.

OOBE

 * A new page has been added to the OOBE which asks if the device belongs to the user or an organization.
 * The page to sign in with a Microsoft Account has been updated.

Apps

 * This is the first build to include the new Calendar and Mail applications.
 * The Microsoft Family app has been added, but isn't functional.
 * Alarms & Clock received a new icon.

OOBE
The OOBE may restart automatically when creating a new account, preventing the user to continue. If this occurs, it can be bypassed by pressing Ctrl to reboot Windows into Sysprep audit mode.