Windows Longhorn build 4000

Build of Windows Longhorn
OS familyWindows NT
Version number6.0
Build number4000
Compiled on2002

Windows Longhorn build 4000 is an unleaked build of Windows Longhorn that was mentioned in the setup of Longhorn builds from build 4005 up until build 4033, where it states that a user cannot perform an upgrade installation on a build lower than 4000.