http://blogs.msdn.com/b/stevengu/archive/2013/09/09/download-windows-8-1-rtm-visual-studio-2013-rc-and-windows-server-2012-r2-rtm-today.aspx

 

Starting today, we will extend availability of our current Windows 8.1, Windows 8.1 Pro and Windows Server 2012 R2 RTM builds to the developer and IT professional communities via MSDN and TechNet subscriptions. The Windows 8.1 RTM Enterprise edition will be available through MSDN and TechNet for businesses later this month. Additionally, today we’re making available the Visual Studio 2013 Release Candidate which you can download here.