If online activation does not work, use the automated phone system to activate Windows. You must activate Windows within 30 days of installation. Activation helps verify that Windows on your computer is genuine.
When you begin the activation process, Windows tries to detect an Internet connection. If one is found, you can activate online.
Depending on how you got your copy of Windows 10, you'll need either a digital license or a 25-character product key to activate it. Without one of these, you won't be able to activate your device.
After determining which activation method you use, follow the steps in the corresponding Activate using a digital license or Activate using a product key.
Digital entitlement happens when you upgrade to Windows 10 from a genuinely licensed copy of Windows 7 or 8. You’ll never need to enter a product key again if you need to clean install on the device you upgraded on. Microsoft essentially is writing the Windows 10 key to your BIOS, storing it permanently on your device and not on the hard drive or through the OS itself.
Even now, after upgrading to Windows 10, then performing a clean install, you’ll find a handy little “Skip” button where you’d typically enter a product key. This is because the Windows installation sees in your BIOS you’ve already upgraded and had a genuine Windows 10 license key.
If you need to swap out or install a new, motherboard, you will have to call Microsoft to extract and/or transfer your license key to the new component.
There are still issues that may pop up where you’ll have to call to verify your Windows 10 installation in the future, just like with any previous version of the OS. However, as long as you have proof of purchase of the original computer and/or license key from an earlier version of Windows, this process is relatively easy.