For Windows 10:
- Select Start > Settings > Update & Security > Activation.
- Under the "Upgrade your edition of Windows" section, select Change product key.
- Enter your Windows 10 Pro product key.
- Click Next to begin the upgrade to Windows 10 Pro.
- If you don’t have a Windows 10 Pro key, you can purchase one here.
For Windows 11:
- Select Start > Settings > System > Activation.
- Choose Change product key and enter your Windows 11 Pro product key.
- Click Next to start the upgrade to Windows 11 Pro.
- If you don’t have a Windows 11 Pro key, you can purchase one here.