Step five: In the new window, select Activate Windows and then Activate, or choose 'I changed hardware on this device recently' if you've changed out components on your PC.(Note: Not the Troubleshoot option listed in the sidebar.) Step four: If Windows 10 is not activated, find and press Troubleshoot.Step three: With Windows running, press the Windows key, then go to Settings > Update & Security > Activation.(Note: you'll need to perform the following steps as an Administrator in Windows to complete them successfully.) If you've made significant hardware changes, you may need to follow the next steps. You'll be able to check whether Windows has activated using your linked digital license in the next step. Windows may automatically activate at this point. (You can also set up a local account, and then add a Microsoft account afterward.) Step two: Setup and log into Windows 10 using the Microsoft account you linked to your Windows 10 digital license.Step one: During Windows 10 installation, select I don't have a product key when prompted to activate.Image Credit: TechRadar (Image credit: TechRadar)