Oh man! The leaks for Windows 8 builds have started. The Windows 8 Build 7850 M1 has been leaked out and is available to download. Few days back an official Windows 8 wallpaper was also leaked and we reported that, and this time it is the OS itself!
This leaked build of Windows 8 is probably an old build and not any one of the recent builds they were working on or they are working on now.
The build may be now available on various torrent sites. But it is recommended not to go with the Windows 8 Build 7850 M1 build as it is an early edition, and so be careful while handling it.