New
#1
You made a mistake in doing a fresh re-install before you did an upgrade from your existing Windows 8.1 Pro install. You must do an in-place upgrade to Windows 10 and make sure Windows 10 is activated with Microsoft before you can do a clean re-install of Windows 10. Once the upgraded install is activated you can install 10 without putting in the Product Key. Microsoft's servers keep a record of the machine and the key.
At this point you have no choice but to reinstall Windows 8.1 and let it activate before you can upgrade to Windows 10. Upgrade with Windows 10 Pro.
Last edited by owensdj; 31 Jul 2015 at 07:56.
Thanks owensdj... I should have known this.... I guess my age is really starting to show.. :)