Windows Server 2012 build 7788

Build of Windows Server 2012
OS familyWindows NT
Version number6.1
Build number7788
Build revision0
Build labfbl_core1_hyp_dev
Compiled on2010-07-27
Expiration date
Timebomb2010-10-01 (+66 days)
Enterprise Server (Core)
Datacenter Server (Core)
About dialog

Windows Server 2012 build 7788 is a build of Windows Server 2012, which was uploaded on 24 June 2022. It is the earliest available server 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.

Editions and keys[edit | edit source]

Edition / SKU Key
Enterprise / Enterprise Core 7P8GH-FV2FF-8FDCR-YK49D-D7P97
Datacenter / Datacenter Core (edition upgrade only) 7X29B-RDCR7-J6R29-K27FF-H9CR9

Redpill[edit | edit source]

This build is one of the earliest to contain 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[edit | edit source]

Language profiles[edit | edit source]

The ability to manage installed languages through the use of a dedicated Control Panel page has been added, although its interface is rather primitive at this point of development.

ISO mounting[edit | edit source]

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

Hybrid Boot[edit | edit source]

Hybrid boot has been introduced in this build, owing to the fact that this build originates from a kernel branch.

Multi-monitor taskbar[edit | edit source]

The taskbar has been updated to support usage across multiple monitors. Taskbars that are displayed on devices other than the primary monitor do not display a Start button, but will display pinned or running application icons.

Aero Lite[edit | edit source]

This is the earliest available Windows build to feature the Aero Lite visual style, which is almost identical to the Windows Aero visual style at this point in development.

Auto colorization[edit | edit source]

The ability to automatically change the window color based on the background has been added. It can be enabled by appending AutoColorization=1 to the end of the Aero theme's [VisualStyles] section.

VBE 2.0 bugcheck[edit | edit source]

The bugcheck screen has been updated to support version 2 of the VESA BIOS Extensions specification. The system must crash during boot in order for the new version of the crash screen to appear.

Hyper-V Virtual PCI Bus[edit | edit source]

This is the earliest available Windows Server build to support the Hyper-V Paravirtualized PCI bus (VSP, VSC, and PCIP stub) in order to facilitate SR-IOV networking.

PDF Reader[edit | edit source]

This is the first build to include the PDF Reader application. However, it is named PDFReader.exe instead of glcnd.exe (as in later builds) and will crash if an argument for a PDF to display is not provided. It will not render the PDF if an argument is provided.

File Copy dialog[edit | edit source]

This build contains an early version of the redesigned File Copy dialog, although it's disabled by default. To enable it, merge the following registry key:


Miscellaneous[edit | edit source]

  • The default Aero theme 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 the contents of the build.
  • The Windows Classic color scheme from Windows 98 is now used as the default visual style.
  • Changed the default desktop background color again to the one used in Windows Server 2008.
  • Added the Microsoft Confidential disclaimer to the desktop and winver.
  • This build is the earliest known build to use a Windows Boot Application, hvloader.efi or hvloader.exe, 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".
  • Support for the Paravirtualized USB Bus from Windows Virtual PC has been removed.
  • A new User Tile has been added, which just displays the user's current profile picture in this build. It can be disabled just like any other taskbar element.
  • Server Core SKUs now use the background color from Windows Server 2008 R2.

Bugs and quirks[edit | edit source]

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

Hardware compatibility[edit | edit source]

To install or run this build in VMware Workstation 16 or newer, the hardware compatibility version must be set to versions 11.x or lower since it hangs on the boot screen when set to 14.x and later versions.

General[edit | edit source]

  • 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/UEFI firmware) will allow the build to boot normally.
  • The WIM has logs and remnants indicating that when the WIM was created, the pseudolocalized language pack was installed (at 04:06:29 for index 1), then removed (at 04:21:33), then the English language pack was installed (at 05:04:31).
  • A triple fault occurs during boot in VirtualBox unless paravirtualization is disabled.
  • The default user account creation UI (nusrmgr.cpl) does not work in this build. Either the net user command or the Local Users or Groups MMC snap-in (lusrmgr.msc) must be used to create new accounts.
  • The User tile does nothing when clicked.
  • Enabling Hyper-V inside a VM with nested virtualization enabled will result in a triple fault.
  • If the Aero theme is applied, the Windows Classic theme does not function anymore.

Redpill[edit | edit source]

  • The Ribbon shows all possible options at all times.
  • The Start screen will not render the tiles unless the period-correct drivers and a standard user account are used. As of 2024, nobody has got it to render.
  • The Start screen shows up as an Explorer window. It can only be closed by hitting Alt+F4, although the start screen cannot be brought up again with the ⊞ Win key.

Multi-monitor taskbar[edit | edit source]

  • Unlike client build 7779, only the first two monitors will show the taskbar.
  • Changing the screen resolution of the second monitor will cause the taskbar appearing as a large white line and the wallpaper will not be correctly resized. Restarting explorer.exe will fix these issues.
  • The Metro Horizon will only be displayed on the main monitor, with additional monitors showing the ImmersiveBackgroundWindow fallback.
  • After a program is closed, the program's icon will still appear on the second monitor's taskbar unless a new program is dragged to the second monitor.

Gallery[edit | edit source]

Setup[edit | edit source]

Interface[edit | edit source]

Redpill-specific[edit | edit source]