I built my computer 4 years ago and I have recently upgraded the motherboard and the CPU, and now I want to add an SSD. Back then I put an OEM copy of windows 8.1 pro on my hard drive. I used Microsoft's free windows 10 upgrade and I want to know if it is possible to transfer just my OEM OS to the SSD. If possible, are there any resources you could point me to? I tried to youtube it but its a lot of laptop stuff and doesn't seem OEM specific. Thanks!