I am going to need to upgrade my motherboard in the future, which means I'm going to have to reinstall windows 10. I came from Windows 7 and took the upgrade, so it's was digital and updated from an already existing installed version of windows. I don't have a disk with windows 10 on it because it was downloaded via Microsoft updates when it was being offered. How do I reinstall windows 10 if I don't actually "have" windows 10.(exe) or whatever the main file is? I have a legit key and everything I just don't know how to accomplish reinstalling if I don't have anything for the pc to install from. I'm confused.