I want to upgrade my computer to an SSD, do I have to buy a new Windows 8.1 key for that? I want to use the exact same OS as before (8.1). I used ProduKey to find out the product key my computer has right now, can I use that again?
Your Windows Key is tied to your motherboard. As long as you do not change that component of your computer (and haven't used it anywhere else), you should not have any issues re-using your Windows product key.
Your Windows Key is tied to your motherboard. As long as you do not change that component of your computer (and haven't used it anywhere else), you should not have any issues re-using your Windows product key.