Build 5270 (released in December 2005) contained an implementation of the Aero theme which was virtually complete, according to sources at Microsoft, though a number of stylistic changes were introduced between then and the operating system's release.
The first build with full-featured Aero was build 5219. Microsoft started using the Aero theme in public builds in build 5048. Previous user interfaces were Plex, which was featured in Longhorn builds 3683–4042 Slate, which was first featured in the Lab06 compile of build 4042 and was used until the development reset, and Jade (builds 4074 to 4094). Until the release of Windows Vista Beta 1 in July 2005, little had been shown of Aero in public or leaked builds.
The Aero interface was unveiled for Windows Vista as a complete redesign of the Windows interface, replacing Windows XP's ' Luna' theme.
