Step Three Pick out the edition you want of Old Windows Betas. Select your edition Windows Whistler build 2410 Windows Longhorn build 4008 Windows Vista Beta 2 build 5270 Windows 7 Pre-Milestone 1 build 6469 Windows 7 Milestone 1 build 6519 Windows 7 Milestone 2 build 6608 Windows 7 Milestone 3 build 6801 Windows 7 Pre-Beta 1 build 6956 Windows 7 Beta 1 build 7000 Windows 7 Beta 1 build 7022 Windows 7 Pre-RC1 build 7048 Windows 7 Pre-RC1 build 7057 Windows 8 Milestone 1 build 7850 Windows 8 Milestone 2 build 7955 Windows 8 Pre-Developer Preview build 8056 Windows 8 Developer Preview build 8102 Windows 8 Consumer Preview build 8250 Windows 8 Release Preview build 8400 Windows 8.1 Preview build 9341 Windows 10 Technical Preview build 9841 Windows 10 Technical Preview build 9926