Windows Longhorn build 4005

Windows Longhorn build 4005 is a Milestone 4 build of the Microsoft Windows "Longhorn" operating system. Two screenshots of this build have been posted on the BetaArchive forum, but more screenshots from The Collection Book can be found, including the setup. On 23 January 2020, this build was listed on a thread by UX.Unleaked blog founder Grabberslasher to be released to the BetaArchive FTP, and was released in the second set of his 33 Longhorn/Vista builds on 25 January 2020, alongside build 4039 (Lab06 n.030824-1954) and the Home Edition of build 3790.1232.

It is a major update from previous builds such as build 4001, including an updated .WIM installation. It uses the new branding in "winver" but still retains the Windows XP boot screen.

It was also the last build to use centered title bars, which was reintroduced in Windows 8.

Setup

 * Similarly to 4001, the Setup interface has been majorly updated. Now being able to partition a drive correctly and having an entirely new look, setup is now less basic than build 4001.

New features

 * The setup has been updated, making the setup less basic than in build 4001. It can also partition a drive correctly.
 * Nearly all references to Windows XP have been removed by this point, most notably the logo shown within the About Windows dialog box, which was replaced by the Longhorn logo, showing the copyright date, 2006 (assumably a typo of 2003). Windows XP is still referenced in the boot/safe to shutdown screen, in the Help & Support Center, and in the Windows XP Tour.

Bugs and quirks

 * Unpartitioned drives cannot be selected for installation in the setup. To setup from a hard drive without any partitions, select the disk that Windows will be installed on.