The English version of Windows 8.1 Pro RTM has found its way to the Internet
From Neowin:
From Neowin:
Microsoft, for whatever reason they see fit, has decided against posting Windows 8.1 to its developer channels and wanted to make all users wait until October 18th before they can get their hands on the update. But, when there is a will, there is a way, and the Windows 8.1 community has been able go against Microsoft’s wishes by leaking a copy of Windows 8.1 that was sent to OEMs.Windows 8.1 Pro RTM x64 has leaked
As with any leaked copy of any software, you will be installing the software at your own risk and since the bits come from unofficial channels, they could be modified without prior knowledge.