Windows 10 build 16257 (rs prerelease)

Windows 10 build 16257 (rs_prerelease) is a build of Windows 10 version 1803. It was released on 2017-08-02 to Insiders in the Skip Ahead ring.

Changes

 * Eye Control
 * Microsoft Edge receives improvements
 * Console improvements
 * Input improvements
 * Windows Defender Application Guard improvements
 * Bugfixes listed in the official announcement.