Windows Longhorn build 4065

Windows Longhorn build 4065 is a Milestone 7 build of Windows Longhorn. A screenshot of this build's version information was found by ReflectiaX, who proceeded to share it on the BetaWiki Discord on 29 April 2021. It comes from an internal Microsoft event presentation.

This build is also mentioned in build 4074's setup. In particular, it notes that you can only upgrade if running build 4065 or higher.