Sources; https://microsoft.com/technet, https://learn.microsoft.com/Q&A, https://www.windowscentral.com/, https://www.elevenforum.com/, https://forums.tomshardware.com/, https://www.reddit.com/. Tried the 'Generic Version Key' Failed, Error = FAILED NON-CORE EDITION OF WINDOWS The CORE EDITION is 'Core is what Microsoft calls a synonym of Windows 10 Home so it's the same edition' (This is what this system started with), upgrade to Win 11 Home and Product Key is not changed nor digital license. Open command prompt/terminal and run slmgr /xpr, Windows 10/11 Home will be listed as Core edition So must call MS, They change the version to Win11 Pro Retail, soon after it connects to the internet it will phone home, and find the Pro Digital License in MS Activation servers to activate. The key is not your license, so the key used is not a problem as long as you have a legitimate license. >> Bruised a rib on the 11th, very painful. I will set this aside for the next 7~10 days. I will return with a update and solution (If MS worked or not).