Windows enthusiasts who can’t wait to experience Windows 8, the next version of Windows operating system after Windows 7, an early build has been leaked on the web. The leaked Windows 8 ISO image has the build version of 6.1.7850.0.100922-1508 of winmain_win8m1 branch, indicating that it’s compiled and signed off on September 22, 2010. The build is the final build that belongs to M1 milestone, and the Windows 8 development has since been moved to M2, M3 and post-milestone versions up to 6.2.7980.0.winmain.110407-1832, as it has been more than 6 months since the M1.

As the Windows 8 M1 is a very early build which even earlier than Windows 7 SP1, don’t expect too much ‘wow’ factor in it. In fact, most of the label in the OS still indicating it’s Windows 7, but with updated build string.