Windows Neptune build 5000

Windows Neptune build 5000 is an unconfirmed and controversial build of Windows Neptune. Screenshots of this build were uploaded to BetaArchive by member Battler on 11 October 2008. Since then, the screenshots, the build itself, and the member who posted them have been a source of controversy, with many under the assumption that the screenshots and the build are fake. However, there is currently no evidence to prove the authenticity of this build since there is not enough information about the development of Neptune in its early stages.

It is possible that build 5000 may have existed as files  and   from Neptune build 5111.1 contain a dialog window with placeholder text saying " ", suggesting that Neptune builds may have been only in the 5xxx range and that the first build may have indeed been 5000.