Windows Server 2012 build 7788

Windows Server 2012 build 7788 is a build of Windows Server 2012. It was shared onto the BetaWiki Discord server on 24 June 2022. It is the earliest available build to include the Redpill feature locking mechanism and a confidential build warning in the watermark.

Due to its earliness, this build identifies itself as its predecessor in many areas and still bears the 6.1 kernel version, much like builds 7700 and 7850.

Redpill
This build notably features the earliest known implementation of the Redpill feature locking mechanism, which hides most features found in builds of Windows 8 (and its server counterpart). Most Redpill features that are present in this build do not possess any real functionality or do not properly function.

New features and changes

 * The Aero theme's background image has been changed to a blue gradient with a green tint at the lower right, with a message at the top advising Microsoft employees not to leak this build.
 * The title bars use a blueish gradient similar to what is seen in Windows 98, as opposed to Windows Server 2008 R2 which uses gradients found in Windows 2000 by default.
 * Changed the default desktop background color to the one used in Windows Server 2008.
 * Added the Microsoft Confidential disclaimer to the desktop and.
 * This build is the earliest known build to use a Windows Boot Application,  or , to start Hyper-V before the NT kernel.
 * The EULA has been changed to state the product name as "Microsoft Windows Server Code Name '8'" with a EULA ID of "Win8_M1"

ISO mounting
This build is the first build to introduce built-in support for mounting ISOs.

Hybrid Boot
Hybrid boot has been introduced in this build, owing to the fact that it is from a core1 (including the kernel) branch.

Multimon taskbar
The taskbar is now supported on multiple monitors. The taskbar does not have a start button on monitors that are not the primary monitor but will display program icons.

Autocolorisation
Autocolorisation has been added to the Aero theme.

To enable auto-colorization for the Aero theme:


 * 1) Create a copy from.
 * 2) Add   to the end of the   section.
 * 3) Save and apply the theme.

VBE 2.0 BSOD
The Blue Screen of Death/bugcheck screen has been updated to support VBE 2.0. The system must crash during boot in order for the new version of the crash screen to appear.

Bugs and quirks
This build is fairly buggy due to a lot of reverse integration happening around the time of its compile.

General

 * This build includes a non-functional XHCI driver and will not boot if USB 3.0 is enabled. Disabling USB 3.0 from the VM configuration (or through the physical machine's BIOS/EFI firmware) will allow the build to boot normally.
 * The WIM has logs and remnants indicating that when the WIM was created, the pseudolocalised language pack was installed (at 04:06:29 for index 1), then removed (at 04:21:33), then the English language pack installed (at 05:04:31).
 * This build will triplefault during boot in VirtualBox unless paravirtualisation is disabled.
 * The user account creation UI does not work. Command Prompt must be used to create new accounts.
 * The usertile does nothing when clicked.

Redpill

 * When Redpilled, the ribbon shows all possible options at all times when Redpill is enabled.
 * When Redpilled, the Start Screen will not render tiles unless you are not using the Administrator account and are using period-correct drivers. Nobody thus far has got it to render.
 * When Redpilled, the start button and key do different things. The Start Button brings up the old Windows 7 start menu, but the Start keyboard key brings up the Start Screen.
 * When Redpilled, the start screen shows up as an Explorer window. It cannot be closed through its task thumbnail.

Multimonitor Taskbar

 * Only the first two monitors will show the taskbar.
 * When changing the screen resolution of the second monitor, the taskbar will appear as a large white line and the wallpaper will not be correctly resized. Restarting  will fix these issues.
 * The Metro Horizon will only be displayed on the main monitor, with additional monitors showing the ImmersiveBackgroundWindow fallback.
 * When an app is closed, the program's icon will still appear on the second monitor's taskbar until a new program is dragged to the second monitor.