Activate Windows 10 Pro
Activate your Windows 10 license
When you buy a refurbished device running Windows 10, you'll need to activate Windows using the product key on the Certificate of Authenticity (COA) that's attached to your device
- Select the Start button, and then select Settings > Update & Security > Activation.
- Select Change product key.
- Type in the product key found on the COA and follow the instructions
A product key is a 25-character code, that looks like this:
PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
TIP: Take a photo of your product key or write it down on a piece of paper to make entry easier.
To remove the gray coating that conceals the product key, gently scratch it off using a coin or your fingernail.