i boot from my usb, which has windows 8.1 to perform a clean install of it, and when i enter my product key, it says "The product key entered does not match any of the windows images available for installation. Enter a different product key." , when i try to install windows 8.1 activated from the Upgrade Assistant, and put my product key, it says "This product key cannot be used to install a retail version of Windows 8.1"
I got my product key from: https://www.g2a.com/microsoft-windows-8-1-standard-32-64-bit-cd-key-global.html
I got my product key from: https://www.g2a.com/microsoft-windows-8-1-standard-32-64-bit-cd-key-global.html