Windows Longhorn build 4067 (idx01)

Windows Longhorn build 4067 (idx01) is a Milestone 7 build of Windows Longhorn, which was uploaded to BetaArchive's FTP server on 11 July 2021 only in the IA-64 architecture. It is notable for being the last known build to use the "Ripe Field" Bliss image as the default wallpaper, first introduced in build 4042 (Lab06_N). In addition, it is also the last known build to have working 3D views such as the Panorama view.

This build was compiled in evaluation mode and can be installed on the current date.

Avalon
This is the first known non-x86 compile of Longhorn that contains a near-complete implementation of the Avalon framework. Components such as the sidebar and Explorer preview pane are included.

3D Views
The Panorama, Carousel and LVSpy views can be enabled by merging the following values into the registry. The Carousel view only enlarges icons, with no other noticeable effect.

Preview Pane
The Preview Pane has been tweaked since its third redesign, as first seen in Windows Server 2008 build 4066. While still lacking any real functionality, the mode switch button has been changed into a smaller label button.

Search
A new Search option is visible in the left-hand filters pane. It is titled "Search In", implying the future ability to search and filter in areas other than the current folder.

Composition

 * The Desktop Window Manager may still be activated on capable hardware by using the keyboard shortcut Ctrl.
 * MILRender is present in this build. While it includes functional Aero Stars, DWM framing cannot be tested at this time due to a lack of compatible hardware.

Jade visual style
While the Slate theme is still present, it also contains the new Jade theme that is also present in builds 4066 until 4093.

New icons
Many of the icons were replaced with new, more modern icons as seen in build 4066, such as the My Computer and Internet Explorer icons. These icons support higher resolutions, which show up properly when the icons are scaled. However, similarly to post-reset build 5048, the Control Panel and Printers and Fax icons are from Windows 95. The correct Control Panel icon is shown only in some places of the operating system such as the start menu.

Aero taskbar and sidebar resources
Like in build 4066, the resources for the Aero taskbar and sidebar are present, but they cannot be normally used because the build is hardcoded to use the Slate resources. A modified version of the assembly is required in order to load the Aero resources. Once loaded, it can be seen how a bug makes the sidebar tiles draw the background of the sidebar a second time and tile separators not extend to the right of the sidebar. It is also worthy of noticing how the text of the taskbar buttons shifts between black and white, depending on whether a window is in its normal or maximized state, in a similar fashion to the unleaked build 4050. Unlike in build 4074, it is not necessary to set up the  DWORD in order to get the transparent taskbar and sidebar; instead, DWM has to be started while Explorer is running and sidebar is enabled. The transparent taskbar, though, cannot be tested as of yet.

Other Aero resources
Along with Aero taskbar and sidebar resources, this build includes resources for Aero clock and Aero preview pane image resources plus gradients, which would be included, but never used in later pre-reset builds, thus also requires modifying.

Bugs and quirks

 * This build is highly prone to unrecoverable hangs; a hard reset of the machine may be required in most cases.
 * Due to this build lacking WinFS, applications dependent on the framework (such as Outlook Express), alongside with WinFS-provided virtual folders/libraries, do not function. WinFS-related folders can be removed from the Computer system folder through the use of registry editing.
 * Due to the heavier nature of 64-bit binaries, Explorer will consume a copious amount of memory right after logging in, even with advanced features such as the Sidebar disabled.
 * Explorer group headers are chopped off at the bottom when using the Jade theme, as is the case in build 4066.
 * Minor graphical artifacts can be observed within the Explorer interface if the sidebar is enabled.
 * The start button will not display properly if the sidebar is enabled and Slate resources are used. This causes the start button to be less soft than in build 4042 to build 4053, and the hitbox does not reach all the way to the corner.

Gallery
Most screenshots and photographs in this gallery are courtesy of BetaArchive member linuxlove.