Windows 8.1 Preview download link has been spotted, but it doesn’t seem to work for the time being. The landing page will most likely be rolled out in the next few hours which will allow us to download ISO version of Windows 8.1.
there will be two ways to install Windows 8.1 Preview. Either from the Windows Store, or as a stand-alone ISO that would allow you to set up a dual-boot configuration and install the operating system on a different partition.
Via WinClub.pl