Microsoft can reveal the very first beta of Windows 9 at the WPC conference next week according to Russian leaker WZor but Windows 9 Build 6.4.9788 is already being tested right now and is very likely to leak in the coming days. 
A Windows leaker named FaiKee said in a new tweet that the ISO image has 3.83 GB in size and comes as en_windows_6_4_9788_0_x64_dvd_0000000.iso.
Source: FaiKee
