I have a 1 tb hard drive on my pc with a "non-legit" windows 8.1 installed on it, and I want to pay a legit one. I also want to install it on the new SSD I'm gonna get (Crucial BX200 SSD 240GB), you can suggest me another one, I'm open to suggestions. I'm going to get a windows OEM key. How should I make it without losing any of the files I have on my current pc? Thank you.