Step 1: Check your Windows version
Before getting started with upgrading, you should check to see which version your PC is running. To do so, head to the search box in the Windows 10 Taskbar, or click on the Start Menu. Next, type in About.
In the list of results that appear, click on About Your PC, which will launch a settings window. Scroll down to the bottom portion of the screen, and check under Windows Specifications to see which version of Windows you’re running. If it lists Windows 10 Pro, then there will be no need to upgrade. If not, proceed to Step 2.
Step 2: Click to upgrade
Next up, in that same window, click on Change product key or upgrade your edition of Windows. Doing so should open up the Activation settings page. You will now see two ways to upgrade from Windows 10 Home to Windows 10 Pro.
If you’ve already purchased a Windows 10 Pro product key, you can click on Change Product Key and simply enter your key to upgrade. Windows will check the key against Microsoft servers. Once it validates your computer will download some of the required files for Windows 10 Pro, prompt you to reboot, and then switch you into the new version of the operating system.
Step 3: Restart your PC
You’ll be able to see the new Windows 10 Pro once you restart your computer. You’ll then have immediate access to Windows 10 Pro’s impressive features, like the advanced connectivity and security settings.