Windows 10 build 18853

Windows 10 build 18853 is an unleaked build of Windows 10 May 2020 Update. A screenshot of its Command Prompt was shown off in the final seconds of the announcement video for Windows Terminal. Another screenshot of this build running Windows Terminal was shown by a Microsoft employee on 17 May 2019, and later referenced in an issue posted to GitHub by the same Microsoft employee on 26 August 2019.