Windows Vista build 5001

Windows "Longhorn" build 5001 (with a build tag of 5001.winmain.040927-1610) is among one of the first builds of Windows Vista to be compiled after the development reset of Windows "Longhorn".

Despite being similar to Windows XP due to the early development, it contains a Longhorn bull wallpaper that is simply the Bliss wallpaper with a Longhorn bull added. Alongside, the banners in "About Windows" has been updated to say "lh" instead of "XP".

Images of this build was released by UX.Unleaked in 2008-05-01. There has always been a debate whether this build's screenshots are real or not.