Windows 7 build 6519

6.1.6519.1.winmain.071220-1525
	Build of Windows 7
Release name	Milestone 1
OS family	Windows NT
Version number	6.1
Build number	6519
Build revision	1
Architecture	x86, x64
Build lab	winmain
Compiled on	2007-12-20
Expiration date
Timebomb	2008-05-07 (+139 days)
SKUs
	Starter; Home Basic (N); Home Premium; Business (N); Ultimate
About dialog

Windows 7 build 6519 is the official Milestone 1 build of Windows 7, which was uploaded to the BetaArchive FTP server on 10 June 2008.^[1]

Components from the x64 checked/debug flavor of this build were discovered on the Microsoft Symbol Server on 18 June 2022.

New features and changes[edit | edit source]

Hardware support[edit | edit source]

This build introduces a feature internally known as "drift correction", which resolves issues related to Intel CPUs' timestamp counter (TSC) circuit timing that could either potentially prevent services from starting up correctly, cause unexpected shutdowns and/or break the Windows component-based servicing stack entirely.

User interface[edit | edit source]

Shell[edit | edit source]

Further changes to search facilities have been introduced in the Windows Explorer application - search history can now be additionally resized, and the Explorer shell no longer overlays a watermark when running a Windows installation that features the base Starter edition. The feedback button now utilizes a different icon, showing the Windows logo on a black background.

Branding and the desktop watermark now identifies the operating system by its final name.

Control Panel[edit | edit source]

The Windows Firewall and Problem Reports and Solutions applets have been merged into their own separate pages. An (albeit largely non-functional) applet for sensor devices has been implemented, although the latter is nearly visually identical to the Windows SideShow applet page save for it utilizing a horizontal layout.

The Control Panel now sports a teal-colored aurora graphic on the left-hand options breadcrumb menu in place of the older strands branding graphic; this does not appear to persist across all options and may retain their older appearance.

Miscellaneous[edit | edit source]

The DirectWrite text rendering framework has been added to the operating system.

Redpill-specific functionality[edit | edit source]

Registry changes and enablement[edit | edit source]

Libraries[edit | edit source]

Nine additional library folders have been added to the existing Libraries system, and the invalid folder path bug that prevented the creation of new libraries has been fixed. A new icon design for libraries has also been introduced, depicting an assortment of folders neatly organized within a plastic divider.

Bugs and quirks[edit | edit source]

Installation[edit | edit source]

Initialization text displayed after the first setup phase may be truncated if setup is started at a resolution lower than 1024x768 pixels.
The first phase reboot countdown is not displayed properly and will draw over existing user interface elements.

Miscellaneous[edit | edit source]

The User Account Control icon is not displayed properly on applications that require administrative elevation.
Context menu elements may persist on the user's display area after selecting an item. The only way to work around this is to log out of the session and log back into the previously used user account.
Interacting with UI elements, dragging or resizing the Windows Media Player application may result in an application deadlock.