Now I have windows 8.1 on my HDD dont want to upgrade to 10 as it caused problems when gaming, I want to move the OS to my new SSD and leave games and other programmes on the HDD, what i am confused about and worried is when I move the OS (ill try get it onto a USB then boot from there) to the new SSD (clean install) will that mean I have an operating system on both my HDD and SSD, as I dont want anything on my HDD? also what I am getting at is will my clean install of 8.1 on my SSD work without it saying you need to activate windows, as im already running it on the old HDD - how does windows know that I am running it on the same device?