Windows 10 build 16238 (rs onecore ens oss dev3)

Windows 10 build 16238 (rs_onecore_ens_oss_dev3) is an unleaked build of Windows 10 Fall Creators Update. It was showcased in the session "Windows Defender Exploit Guard: Reducing the Attack Surface while balancing productivity & security" at the Microsoft Ignite 2017 conference.