Windows 10 build 9821

Windows 10 build 9821 is the earliest known Technical Preview build of Windows 10. It features the search icon on the taskbar, Task View, and a refined Start menu. This build was leaked on 2020-05-11. As with other builds in the fbl_partner_eeap branch, it can also boot with the current date without complaining about expired certificates, because it is test-signed, not flight-signed.

Windowed Metro
This build is the first known build to possess windowed Metro capability. The title bars of apps in this environment colored black.

New Icons
Some icons (including Explorer) have been changed to a flatter style.