Wow! that was fast, and we all saw it coming! It has only been a few days since the first copy of Windows 8 leaked into the wild and now we already have software tools to bypass Windows 8 activation procedures.
Yes you read that right! Windows 8 Build 7850 (final M1) has managed to slip through and has landed into the wild. The Build number of the leaked 6.1.7850.0.winmain_win8m1.100922-1508_x86fre_client-enterprise_en-us.iso is 6.1.7850.0.winmain_win8m1.100922-1508 which means that it was compiled on 22nd September 2010.