Here's how it goes:
You just bought a new laptop that comes with Windows 10 Home pre-installed. After using it for a bit, you soon realise that the Home edition doesn't share the same security features with the Pro edition. So, you plan to upgrade it to Windows 10 Pro, but you don't know where to start...
Begin with this checklist:
1. Have you updated your Windows 10 to its latest build?
2. Do you have a Windows 10 Pro license?
If you've answered yes to both, you may begin upgrading your PC!
Changing your product key to a Windows 10 Pro key
Head on to Settings > Update & Security > Activation. At the Activation tab, click on "Change product key". From here, enter your Windows 10 Pro license key to prompt your computer to upgrade to the Pro edition.
Your PC should restart a couple of times. Not to worry, this is just part of the upgrading process.