› tutorials › 7209-change-productChange Product Key in Windows 10 | Tutorials - Ten Forums Nov 09, 2020 · If you install this build of the Windows 10 Insider Preview on a PC and it doesn’t automatically activate, you can enter the product key from Windows 7, Windows 8 or Windows 8.1 used to activate the prior Windows version on the same device to activate Windows 10 by going to Settings > Update & security > Activation and selecting Change ...