Over the Internet
Log in to the computer as an administrator, and then connect to the Internet.
Press the WindowsΒ Β +Β IΒ keys to open the Settings charm.
SelectΒ Change PC settingsΒ in the lower-right corner of the screen.
InΒ PC settings, select theΒ Activate WindowsΒ tab.
Once Windows is activated, the Activate Windows tab no longer displays in PC settings.
Select theΒ Enter keyΒ button.
If you used discs to install Windows 8, you might find the product key on the disc packaging. If you bought Windows 8 over the Internet, the product number might be included in an email you received after the purchase and download of Windows 8.
If you have the WindowsΒ 8 disc packaging, apply the Windows 8 Certificate of Authenticity label to your computer for easy reference in the future.
Type the product key into theΒ Product KeyΒ field.Windows automatically detects whether the product key is valid.
If a User Account Control message displays, enter your password or provide confirmation.
If product activation is successful and aΒ Thanks, you’re all doneΒ message displays, clickΒ Close.
If activation was not successful, check the key and enter it again.