After long wait, Windows 8 build 7850 has been leaked and is available.The build string of this build is 6.1.7850.0.winmain_win8m1.100922-1508 and it was compiled on 22nd September 2010. We have got several confirmations from our sources that the build is original.Windows 8 build 7850 belongs to Milestone 1 and is pretty old, so we may see very less changes in this build.