So, if the question “How to re-enter my Windows product key?” is the reason you ended up on this page, you should move on to the instructions below and carry out what is stated there.
The good news is, changing the product key in your OS, be it Windows 7, 8, 8.1, or 10, is a simple and straightforward procedure. It is a wise idea to keep your Windows product key handy: you can use it to upgrade your OS to a newer version or to activate your Windows should the need arise. Developed for Windows 10 (8, 7, Vista, XP)
