If you use Windows 10 Pro Education, you can use Windows 10 Pro license key to activate it. To download Windows 10 Pro ISO from Microsoft you visit here: Windows 10 Pro has some editions It looks like this: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. The windows10 Pro key is a 25-character code that’s used to activate windows on your computer. Windows 10 Pro product key is a digital key which you need when you activate your Windows 10 Pro.