Windows 10 build 17623

Windows 10 build 17623 is a build of Windows 10 version 1809. It added support for HEIF (High Efficiency Image File), the ability to allow external GPU's to be safely removed from the computer, brings the privacy settings improvements in the OOBE from 1803 build 17115 and Windows Defender Application Guard improvements. This build also fixes many issues that were present in earlier RS5 builds.