Windows Vista build 5212 (winmain)

Windows Vista build 5212 (winmain) is a pre-Beta 2 build of Windows Vista. This build was leaked on 19 December 2016 to BetaArchive.

This is the leaked winmain compile, and it's not to be confused with the vbl_ux_dev_checkin compile.

Setup
Although setup is similar to aforementioned builds of Vista, the autorun prompt upon booting into setup now fits more perfectly on the screen and is positioned correctly. Fonts used in the first page of setup also now use anti-aliasing once again.

Changes and new features

 * The watermark now states Beta 2 rather than Beta 1.
 * The Avalon/Indigo and fundamental drivers shortcuts have now been removed.
 * Upon right clicking on applications, a new "Run Elevated..." prompt will appear. This essentially runs applications under administrative privileges.
 * Speech Recognition applet has been added to Control Panel.
 * Castle service has been re-added from build 5098.
 * Windows Color System Service has been added.

Windows Media Center
Windows Media Center and its services has been included in this build, and it features a drastically different look compared to the one featured in Windows XP Media Center Edition 2005. It is also included on the taskbar by default.

Windows Calendar
Windows Calendar has been added in this build.

Windows Help and Support

 * Working offline option has been added.
 * Minimal user interface updates have happened such as new arrow buttons.

Windows Photo Library
This build also includes the earliest version of Windows Photo Gallery, called Windows Photo Library (it's based on Microsoft Digital Image Library).

Flip3D
This is the first leaked build to introduce what was known as Flip3D. It contains similar functionality to ALT+TAB, however it now utilizes the Desktop Window Manager in this build and creates a 3D flipping effect in between all of the applications currently open, thus the name "Flip3D". Flip3D can be used via pressing WIN+SPACE, rather than WIN+TAB which was used in later builds.

Windows Sidebar
This build is the first post-reset build of Windows Vista to reintroduce Windows Sidebar. Rather than working inside explorer.exe (which caused memory leaks), this time the Sidebar runs in its own process. In this build, the Sidebar doesn't start automatically upon booting up.

Gadgets are mentioned as "Parts" inside the user folder. There are four gadgets: Clock, RSS Feed, Photo Slideshow and Search.

Tablet PC Components
This build includes Windows Tablet PC components (Sticky Notes, Inkball and Windows Journal apps; Tablet Settings and Pen Properties Control Panel applets; Pen Service).

Other changes include:
 * "Notes" folder has been added to the Documents folder which contains .jnt files (regarding Windows Journal).
 * Flicks Introduction Wizard has been added.
 * Pen Flick Gestures tray menu has been added.

Bugs

 * If launching the Sidebar process and then terminating it, the watermark may not position itself correctly.
 * If recycling something or adding something to the recycle bin, the icons won't change unless you log out and log back in.