Hello, I'm going to be upgrading my Motherboard, CPU and RAM in the upcoming weeks. I still wish to use my current HDD and Graphics Card. The problem is, I've heard that Windows 8 OEM can be used on a different set of hardware, however only on one computer at once, so how do I go about this? I'm expecting I'll need to uninstall Win8.1 OEM on this computer then use the same copy on the new motherboard, but how will I go about installing it onto the new motherboard. I also don't have any sort of disk or product key; Windows 8.1 solely came with my current hardware.