Windows 10 still free if you have Windows 7 or 8
Microsoft Download link: https://www.microsoft.com/en-us/soft...load/windows10
Download the OS and perform a clean install. You will be prompted for the product key during install, but not for the download. Use the same Win 7 or 8 key that you legally own.
The same download can be used for multiple installations as long as you have unique legal Win 7 or 8 keys.
Win 10 Home or Pro will install depending on your product key, the same download is valid for both.