Posted 14 September 2016 - 11:11 AM
Yes, you are on the right track.
Since you said you had Windows 10 Pro, and I am going to presume that you installed this via the upgrade process (whether GWX or Media Creation Tool), that means that you had to have had Windows 8/8.1 Pro as your underlying base OS prior to the upgrade.
You should be able to download the latest Win10 ISO using the Media Creation Tool or Tech Bench and run a clean install of Windows 10. As John has already mentioned your license for Windows 10 for a given piece of hardware is stored on Microsoft servers and you are entitled to reinstall a clean copy at any point in time if you have an existing license. You will probably not even be asked about licensing if the installer queries the servers first, and I believe it does.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1809, Build 17763
Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome, charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime.
~ Mark Twain