I managed to find a way to legally download a Windows 8.1 Pro .ISO, do a clean install of Windows 8.1 and then use my legit code to Activate it.
Bit convoluted but worked for me;
Part 1 Taken from EigthForums (http://www.eightforums.com/installation-setup/33164-how-download-windows-8-1-iso.html);
Follow these steps to download the Windows 8.1 ISO.
Part 2 (Taken from SuperUser.com (http://superuser.com/questions/661261/windows-8-1-fresh-install-with-windows-8-licence);
The Windows 8.1 installer from the ISO does not accept Windows 8 keys. You need to install the system with a generic key (334NH-RXG76-64THK-C7CKG-D3VPT for Core, XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB for Professional) and then enter your Windows 8 key after installing.
Note to moderators: these are not usable Windows keys. They are embedded in Windows itself as a placeholder default key and do not let you activate.
So from that I legitimately created a bootable USB with Windows 8.1 Pro on it, installed using the generic placeholder key, then activated with my legitimate cd key.
Bit convoluted but worked for me;
Part 1 Taken from EigthForums (http://www.eightforums.com/installation-setup/33164-how-download-windows-8-1-iso.html);
Follow these steps to download the Windows 8.1 ISO.
- Go here Upgrade Windows with only a product key - Microsoft Windows Help scroll down and click on both 'Install Windows 8' and 'Install Windows 8.1'
- Run the Windows 8 setup and enter your retail Windows 8 key, click next and when i begins downloading, STOP it! Exit setup.
- Now run the the Windows 8.1 setup. It will produce and error. Exit and then run Windows 8.1 setup again.
- It should now be downloading the Windows 8.1 ISO. Afterwards you can save it as an ISO or create the USB media immediately.
Part 2 (Taken from SuperUser.com (http://superuser.com/questions/661261/windows-8-1-fresh-install-with-windows-8-licence);
The Windows 8.1 installer from the ISO does not accept Windows 8 keys. You need to install the system with a generic key (334NH-RXG76-64THK-C7CKG-D3VPT for Core, XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB for Professional) and then enter your Windows 8 key after installing.
Note to moderators: these are not usable Windows keys. They are embedded in Windows itself as a placeholder default key and do not let you activate.
So from that I legitimately created a bootable USB with Windows 8.1 Pro on it, installed using the generic placeholder key, then activated with my legitimate cd key.