I bought a prebuilt pc a while ago i have now decided to buy parts and build a custom pc, but i want to keep my HDD from my current pc as i want to move my OS onto my SSD in my new custom build, but none of these posts tell me how to do this when i have the windows 7 home premium OEM i also upgraded to win 10 when it had the free upgrade, i would be glad if someone could just leave a comment/responce telling me how i can go about this problem ?