How to Get a Free Installation Disk for Windows 8.1 http://www.techsupportalert.com/content/how-get-free-installation-disk-windows-81.htm
I created a USB Flash drive in a laptop with Windows 8.1 Update. The process worked well, it took about 1.5 hours (15+ min. in the last 10% of the last step, "Creating the USB Flash drive"). I haven´t actually try an installation, some doubts remain: Does it work in an OEM computer? That is, does it read automatically the activation key embedded in the firmware? Does it install 8.1 Update?
Indeed, why would they make it simple to use something you'd already purchased....! If you do get a chance, tell us how it goes.
Answers: yes and yes. See http://www.eightforums.com/tutorials/18309-windows-8-windows-8-1-iso-download-create.html.
So, what exactly is this? Is it a full Windows 8.1 installation and upgrade media? Who is it for? Windows 8 owners?