When I built my P.C. I used one of those 20$ Windows 10 N keys to keep the price down, and although it works, I keep coming across very obscure problems with it, such as not being able to use any of the hardware recording such as NVIDIA Shadowplay, even after installing the latest Media Feature Pack which should make my OS no different from the Home edition. I am fed up with scouring the internet for solutions and am ready to shell out some money to get a Windows 10 Retail key. How would I go about upgrading this OS? Or would it be necessary to do a clean install?