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Welcome to BetaWiki!

An open encyclopedia of software history

Did you know...

  • ...that Windows XP build 2223 had commented out code in its Business theme file that would allow the user to configure different colors based on its settings?
  • ...that Apple has officially released several developer releases of what would later become Mac OS X for the x86 architecture as a part of its NeXT legacy, and secretly continued to maintain the port until Tiger?
  • ...that Windows Server 2003 has been renamed four times during development, before settling on its final name?
  • ...that some builds of Windows 98 and Windows 2000 contained a Show Desktop button on the taskbar, which would be scrapped later until Windows 7 build 6568?
  • ...that no build of Windows Vista (including pre-reset) actually used or even included the widespread Longhorn sound scheme?

Featured article

Windows 2000 build 1515.1 is the earliest leaked build of Windows 2000. This build introduces many features originally found in the Microsoft Cairo project, most notably Distributed File System, CairOLE (OLE) and CSCRIPT.EXE, a new user interface provided by the Windows Desktop Update as well as many user accessibility improvements which have been a key part of Windows 2000's development. It also includes Plug and Play driver support, Windows Installer support, and the Microsoft Management Console.

Some server components are present on this build installation media, along with the build binary output logging files, which means that the build was leaked directly from the build machine output folder at Microsoft.


Stay home and play with betas!

BetaWiki now encourages the use of the DMY date format (i.e. 30 June 2019). Please review the new date format guidelines for more information (they have considerably changed since the draft!).

We now have the 2017 wikitext editor! Please report any problems that you encounter on the Discord. If you don't like it, you can disable it on the Editing tab in Preferences (Use the wikitext mode inside the visual editor, instead of a different wikitext editor).

Recently leaked builds

Windows NT 4.0