OK. I have a question. I'm upgrading from my old 32-bit machine to a new 64-bit machine with a completely different motherboard, processor etc. What I want to know is: If I download a 64-bit ISO and go about installing it on my new PC, will I be able to simply transfer the activation over from my old PC via the phone with my existing product key or will I have to buy a new license? I'm currently using 32-bit Win 8.1 Pro with WMC added on. Thanks in advance.