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 A.Nonymous 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.

Compared to build 5111, the screenshots show a different login banner that features a Windows logo similar to the one used by Windows 2000 Professional, however, the frame containing the flag logo is green rather than the usual orange.

It is possible that build 5000 may have existed as files  and   from build 5111 contain a dialog window with placeholder text saying "Files for Neptune build 5XXX are now available.", suggesting that Neptune builds may have been only in the 5xxx range and that the first build may have indeed been 5000. https://www.betaarchive.com/forum/viewtopic.php?t=16337