Buying a new PC is great, and getting someone to custom-build a machine for you is even better. However, sometimes the technician who built your machine may have forgotten to Activate Windows.

The easiest way to activate Windows 10 is when installing the machine, but if you’ve managed to get through the installer without inputting your license key, follow these steps:

  1. Press the Windows Key, then go to Settings > Update and Security > Activation (or just type “Activation” into the search bar).
  2. Find and press Change Product Key.
  3. Type your product key into the pop-up box, press Next, and then press Activate.

If you don’t have a product key, you can also go from the Activation page directly to the Windows Store to purchase one.