Windows Vista build 5259

This build is the first official build to include the Start orb (although it was in the build 5212) as well as the last known build compiled under the Pre-Beta 2 branch; the next build (5270) was compiled under the Beta 2 branch.

Windows Antispyware is now added, and the setup UI is revamped, including a new Aurora background as well as a new OOBE. There's now an option to change the aero glass color.