Mark your calendars, Microsoft is ready to release the free Windows 8.1 upgrade on the 17th of October, 2013. The announcement was made yesterday by Microsoft's Brandon LeBlanc on Blogging Windows. Special thanks to @nmsuk for the quick find!
With the RTM release of Windows 8.1 imminent, a new report claims that Windows 8.1 RTM build number will be 6.3.9600.16384. This news comes immediately after the leak of build 9477, which was leaked yesterday.
It looks like OEMs (original equipment manufacturers) will receive Windows 8.1 on September 1st, 2013, that is if you believe a Hungarian Windows website which posts the following:
Windows 8.1 - get on 1 September, the OEMs?
A leaked e-mail to Microsoft's OEM partners and system builders sent out yet as of yesterday evening, which will let them know that the OEM system pricing is from 1 September take place, so now it was sure to be a partner with the Windows 8.1 - 's.
The exact date is not known, of course, only one date is available at the beginning of September. In return, the day before surfaced in Windows 8.1 Build numbers, which were as follows: 6.3.9600.16384. winblue_rtm. 130822-2140 ; 6.3.9600.16384.130821-1623 - you can see that the building has received both the 9600 's and the Delta number, so you might be clear to us that their candidate RTM , RTM that is selected from the group belonged versions. This means that Microsoft has chosen them out of the final Windows 8.1 builds. From the above, as stated earlier the Russian sources, therefore we learned, we can easily imagine that after August 21 to three days to the Microsoft to finalize the Windows 8.1 was, for 72 hours in the period, which the Russian news source reported . therefore still can not be sure that the complete update package for the Windows 8 PC, Windows 8.1 final.
The latest sources seem to indicate that RTM has been sent out, but will not be the same as the final bits. This would make downloading the RTM a bit pointless, if true. The word is also that RTM will not be available to Technet or MSDN subscribers.