To upgrade from windows 10 home to windows 10 pro and activate your device you ll need a valid product key or a digital license for windows 10 pro.
Windows 7 upgrade to windows 10 pro.
Before upgrading to windows 10 pro make sure your device is up to date and running the most recent version of windows 10 home.
For more info about how to keep your pc updated see windows update.
If you are installing windows 10 on a pc running windows xp or windows vista or if you need to create installation media to install windows 10 on a different pc see using the tool to create installation media usb flash drive dvd or iso file to install windows 10 on a different pc section below.
You can of course revert back to your old operating system if you so wish but i cannot see any reason why you would want to as win 10 is a much superior system.
When you are happy with windows 10 you can just delete the windows old folder.
Assuming you re using a windows pc with a genuine and activated windows 7 or windows 8 key you can upgrade to windows 10 in just a few clicks.
If you re running windows 10 home select get windows 10 pro to upgrade your device.
Lenovo devices tested for windows 10 version 1809.
How the free upgrade works.
Acer windows 10 creators update.
Dell computers tested for windows 10 october 2018 update and previous versions of windows 10.