Windows Longhorn build 4005

6.0.4005.0.main.030128-1920
	Build of Windows Longhorn
OS family	Windows NT
Version number	6.0
Build number	4005
Build revision	0
Architecture	x86
Build lab	main
Compiled on	2003-01-28
Expiration date
Timebomb	2004-01-26 (+363 days)
SKUs
	Professional
Product key
	CKY24-Q8QRH-X3KMR-C6BCY-T847Y
About dialog

Windows Longhorn build 4005 is a Milestone 4 build of Windows Longhorn. On 23 January 2020, this build was listed on a thread by UX.Unleaked blog founder Grabberslasher to be released to BetaArchive's FTP server, 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.^[1]

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

It is also the last build to use centered title bars for normal windows, which were later reintroduced in Windows 8 build 7779. Centered title bars for maximized windows would remain until build 4015.^[a]

Setup[edit | edit source]

In a similar fashion to 4001, the Setup interface received a design overhaul, and now features a less primitive user interface. This build makes use of the WIM-based installation method unlike the previous one.

Unlike 4001, characters used for product key input are now capitalized, although the ability to automatically split parts of the product key with dashes is not yet present. The EULA page no longer requires the user to scroll to the bottom of the page in order to proceed and instead features two radio buttons for agreement. Drive partitioning has been improved and now features details of each disk with their associated partitions, rather than listing partitions only. The file copy phase now includes a simple, concise explanation on what Setup is doing.

During the second restart, a mostly empty page that asks the user to simply wait for an unspecified period of time is presented to the user. At this point, Setup will automatically detect installed hardware and attempt to finalize the install; this phase is most commonly referred to as the "hardware portion". The user will then be greeted with the out-of-box experience with a design similar to the one found in build 4001, albeit with a new wallpaper. Attempting to create a new user account will cause the OOBE to crash, skipping the final stage entirely and sending the user to the desktop with the default Administrator account.

Setup
Setup - product key
Setup - EULA
Setup - partitioning
Setup - copying files
Setup - hardware detection
OOBE

New features and changes[edit | edit source]

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 (presumably a typo of 2003). Windows XP is still referenced in the boot/safe to shutdown screen, in the Help and Support Center, in the Windows XP Tour, and in Windows Messenger.
Tiles have been modified slightly, such as the slide show tile having a smaller slideshow and the search the internet tile being a button only rather than including a search box alongside it.

Bugs and quirks[edit | edit source]

Installation[edit | edit source]

This build can often be unstable and slow in the 2nd portion of setup.
The EULA mistakenly defines the system as pre-release code for Whistler.
On some machines that use IDE emulation, setup will hang when reading from the installation media.
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. Otherwise, the user can partition and format a drive outside of this build's setup.
Despite not being compiled in evaluation mode, it can boot on the current date. But many drivers aren't installed by default during the hardware portion of setup if you install this build on the current date and have to be installed manually.
The OOBE will crash upon attempting to create a user account.
On some machines and virtualizers, if the floppy drive driver in this build is installed, the system will either hang on the boot screen, or display a black screen after the boot screen. Removing the floppy drive and/or disabling it in BIOS fixes the issue.

Desktop Compositing Engine[edit | edit source]

When Desktop Composition Engine is enabled, it renders the graphics on the hardware layer, while the software layer is rendered as black or leftover data, which means that attempting to use software capturing methods (such as Print Screen) will not produce the screen correctly. Most hypervisors only renders the software layer, usually resulting in a black screen upon starting DCE.