Windows 7 build 6780

Windows 7 build 6780 is a Milestone 3 build of Windows 7.

New features

 * Setup has been heavily updated to resemble the RTM, but with the beta background.
 * This build has a new boot screen showing a new progressbar.
 * The login screen is updated to resemble the official beta.
 * Calculator, Paint, and WordPad has all received numerous updates, taking advantage of the new Ribbon interface for the latter two. Calculator's appearance resembles that of the RTM.