Final Windows 8.1 RTM version number may be 6.3.9600 August 22, 2013 by admin Tweet A new report claims that Microsoft has started to compile the final RTM version of Windows 8.1 and that the first sign off candidate version number will be 6.3.9600.16384. Read more… Neowin Related Posts:The final Windows 11 version 21H2 non-security…Final Fantasy XVI is getting a PC version, plus two…Not just iPad, there might be a version of Final Cut…Microsoft accidentally revealed design prototype of…Windows Holographic version 23H2 has launched with a…