Windows 10 Retail
The instructions below is applicable to the ff. products only:
This Windows version can be ONLY used for 1-time installation on 1 PC only and is NOT transferable. It can be also used to upgrade lower versions of Windows to Windows 10 Professional.
Before upgrading to Windows 10 Pro, make sure your device is up to date and running the most recent version of Windows 10 Home. For more info about how to keep your PC updated, see Windows Update: FAQ.
1. Press the Windows key/logo, go to Settings > Update and Security > Activation.
2. Click the Change product key.
3. Enter your product key, then click the Next button.
4. Click Activate.
Should you require clean installation, please proceed to How to Perform Windows 10 Clean Installation.
Having issues with activation after your upgrade?
See the following for more help activating your valid product key or digital license for Windows 10 Pro: