If the Windows Activation service is unavailable, it may not be possible to activate your copy of Windows 10 online. You can wait 12 hours and attempt activation again to see if the issue is resolved, or you can use the instructions below to activate immediately via telephone.
- Press the Windows key + R simultaneously.
- Type SLUI 4 and press Enter.
- This action will launch the activation wizard. Select your country or region and click Next.
- Make sure you have an active internet connection and call the telephone number listed on the screen.
- Enter the Confirmation ID then click Activate Windows.