When I built my new gaming PC, I just grabbed the HDD of my old computer, formatted it, then installed a new Windows on it (using the new PC). But I decided to buy a 256GB SSD, and replace the hdd. (I will use the HDD in the background for multimedia, if neccessary, but that doesn't matter now) So my question is: Can I install an OS (Win8.1) for the second time, on a different drive? Because I read something which said someting like "You have to sell the OS together with the HDD, with the Win8.1 sticker on it. It cannot be sold separately. (the OS and the HDD)" So I'm not sure if I can use the Win for the second time. Thanks for your help!!!