In this tutorial, we are going to see how to activate Windows 10 professional. A Windows 10 Product Key is a 25-character code used to activate the operating system on your machine. It looks like this:
PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
Step 1: Click on the Start button at the bottom left of your screen. Click on System. You can see "Connect to the Internet to activate Windows."
Step 2: Under Click "Activate", you can see Update & Security > Activation > "Change product key" and click.
Step 3: Enter the Windows 10 product key (25 characters) and click Next.
Step 4: Congratulations, you windows 10 professional is activated.