Hey guys, I'm curious to know one question. In Amazon, I found this cheap version of Windows 8 pro for only 70$. It's called " Windows 8 Pro upgrade 32/64 bit product key card with free update". This product key is required for windows 8 setup to be installed which I can download from the website. However, can I reuse this key to install it in different HDD's? Im buying it *no pirate or tricked codes* but a legit one.