Windows Night

Windows Night is the original never-released NT 6.0 version, that was known as such before the development reset: after it was known as Windows Vista.

Build 3551
Milestone 1 build, August 2001, from mid-2001. Looks identical to Windows Whistler XP Beta 3 except for some changes in the winver.
 * Windows Whistler Theme
 * Windows Aquacolor Theme
 * Windows Whistler XP Theme
 * Lunar Theme

Build 3663
Milestone 2 build, July 31 2002

2002.

Build 3670
Milestone 2 build, August 28 2002.
 * Windows Longhorn Theme
 * BsOD Detector Support
 * Redesigned Notifications

Build 3683
Milestone 3 build, September 15 2002, this build features Desktop Window Manager and Plex interface theming, but the rest also looked like XP like M1/2.
 * Plex Theme
 * Lunar Theme

Build 3706
October 24 2002, features better working DWM.

Build 3713
Build 3713 (build date of November 14, 2002) was leaked on April 26, 2011. This introduces the new style taskbar, a taskbar that is thinner than the one in builds 3683 and 3706. Additionally, Sidebar is now enabled by default. This build also has Tablet PC components and Media Center Edition components.

Build 3718
November 14 2002.

Build 4000
Longhorn Under Construction, Revision 1, December 1, 2002.

Build 4001 (build date December 4, 2002) was the first to introduce the new WIM install style that is still in Windows to this day - a new, simplified Windows Image-based installer that operates in graphical mode from the outset, and completed an install of the operating system in approximately one third the time of Windows XP on the same hardware. It did not leak for nearly 10 years after its compile date.

Build 4002 (build date January 8, 2003) was a build that leaked 17+ years after its compilation. It featured a new wallpaper for the new milestone and 60 fps Desktop Composition Engine.

Build 4005 (build date January 28, 2003) was an interesting build due to its new design for the image-based installer and the new branding (that interestingly said 1985-2006.)

Build 4008
Milestone 4 build, January 31 2003.
 * Red Screen of Death
 * Black Screen of Death
 * Antivirus, Crash, Bug and Virus Fixes
 * New Blue Screen of Death
 * Barney Error Detector Support
 * USB and Bluetooth Support
 * Emoji support
 * Windows XP Theme
 * Dark Mode
 * Darker Mode
 * Even Dark Mode
 * Darkest Mode

Build 4015
Milestone 5 build, April 1 2003.
 * Microsoft Assistant Windows Mascot Support
 * Background Settings
 * Redesigned Settings
 * Microsoft Speech and Microsoft TTS Voice Recognition.

Build 4029
May 29 2003.


 * Redesigned Taksbar Mannager
 * Keyboard Background
 * Laptop and Computer Mouse Control Manager.
 * 3D and 2D Paint Support.
 * 3D Theme.
 * New login screen.
 * Improved perfomance
 * Added support for animated GIF wallpapers.
 * Multiple user accounts and user switching.
 * DVD-ROM and VHS-ROM Digital support.
 * Improved PDC build and DMOS-Expires support.

Build 4033
Milestone 6 build, June 30 2003.
 * Blu-Ray Disk support.
 * Phone Store support.

Build 4039
August 2 2003.

Build 4042
Milestone 7 build, September 8 2003. First build to include Slate UI.
 * Including Slate UI.
 * Slate UI Support.

Build 4051
October 1 2003, PDC demo build.

Build 4074
Milestone 8, April 2 2004. Shown at WinHEC, has feature complete file system/DWM/Aero, more or less, but may require workarounds for it to work in emulation software.

Build 4083
June 2 2004.

Build 4093
Milestone 9 (the only build), last one before reset in 2004.

released:2004

end of life:2017