Windows 10: find out of Windows 10 was upgraded to clean installed
find out of Windows 10 was upgraded to clean installed
I would like to know if there is any way I can find out if on a computer its Windows 10 was upgraded or came from a clean install. And if I can find this out after the 30-day period in which you can still go back to your previous operating system.
Have a look in the registry within the HKEY_LOCAL_MACHINE\SYSTEM\Setup.
There will be entries for Source OS if you upgraded.
You can also run showkey plus from this forum. If it was upgraded it will show you the original OS product key. If it is a clean install, original OS product key will be blank.
Showkey - Windows 10 Forums
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Is there any way to tell
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As I have multiple retail license keys, I am unsure which one is in use right now.
There are 3rd party key finders that may show the key in use, but I prefer to obtain the key using Windows own tools, if possible. For instance...