BetaWiki:Featured article/2019-09

Windows Vista build 5048 (with a build tag of 5048.winmain idx02.050401-0536) is the first Omega-13 build of Windows Vista to leak after the development reset of Windows Longhorn. It was released to attendants of WinHEC 2005, and was known as the "Longhorn Developer Preview". It calls itself Beta 1 in the setup handle but is not the true Beta 1.

The Jade and Slate themes are no longer included, and the Aero theme is now the default, along with its visual effects. It has a new wallpaper and some very Vista-like interface areas. Windows Media Player 10 and Internet Explorer 6 SP2 are also now present. Many of the icons from later pre-reset builds have returned, albeit with minor alterations. A few icons are also new to this build. However, the Control Panel and Printers icons are from Windows 95. The x64 edition of this build is similar to the x86 build, but it has a different EULA and Windows XP x64 Edition brand wallpaper instead of Windows Code Name Longhorn brand wallpaper which is named as winxp.jpg.