Windows 8 build 7777

6.1.7777.0.fbl_grfx.100708-2000
	Build of Windows 8
OS family	Windows NT
Version number	6.1
Build number	7777
Build revision	0
Architecture	x64
Build lab	fbl_grfx
Compiled on	2010-07-08
Expiration date
Timebomb	2010-10-01 (+85 days)
SKUs
	Home Basic; Home Premium; Professional; Ultimate; Not available by default:; Starter; Enterprise
About dialog

Windows 8 build 7777 is a build of Windows 8, which was shared on 27 June 2022 alongside build 7779. Prior to its leak, its build number was mentioned in the readme_please_read.txt text document from the original upload of build 7746. It is the last build of Windows to have left-aligned caption text, as they would eventually be centered in builds 7779 for DWM-composited windows and would be later carried over to non-composited windows in build 7814. Left-aligned text captions would later reappear in Windows 10 builds 9910 and 9913.

Due to its earliness, many areas still say "Windows 7" and the kernel version is still 6.1 (much like builds that predate 7865). Some apps in this build are signed by "Windows Central Build Account".

readme_please_read.txt[edit | edit source]

An unknown 777x build (7777 probably, it's out there)

New features and changes[edit | edit source]

Hyper-V[edit | edit source]

This is the first available build to implement support for the Hyper-V hypervisor on client editions. If Hyper-V initialization fails, messages asking the user to enable virtual machine extensions will be printed directly onto the boot screen instead of being silently recorded into the event log. A similar occurrence can also be visibly observed in builds 7779 and 8128.

Windows Runtime (WinRT)[edit | edit source]

This build adds code to ole32.dll to initialize and shut down the Windows Runtime (WinRT), the new COM-based ABI that would primarily used by Metro, and later, UWP applications. The WinRT functionalities in this build are extremely primitive, and only include APIs for string manipulation using the new base COM type HSTRING and a notification manager for Windows Push Notification Services (WNS).

The WinRT core would be later moved over to the a separate combase.dll library in server build 7788 as a result of internal refactoring.

Windows Push Notification Services (WNS)[edit | edit source]

This build is the earliest to contain an early version of Windows Push Notification Services (WNS), which is used to provide toast notifications from the Internet in Windows 8 and later. It cannot be activated due to its dependency on long-gone internal Microsoft servers.

Settings Synchronization[edit | edit source]

This build introduces Windows 8's settings synchronization between devices functionality. There is no UI in the system to expose this functionality, and the system is dependent on the installation of providers that implement a specific COM interface; the system does not install any providers by default.

Windows Store[edit | edit source]

The Windows Store no longer shows scrollbars if it can't fit on the screen, but is otherwise the same, including the patching method.

Desktop Window Manager[edit | edit source]

DWM.exe now runs as a system-managed Window Manager account and is started by winlogon.exe. Consequently, the UxSms service, which used to launch DWM as the logged-in user, has been removed.