Have recently purchased an Optiplex 7040 with Win 7 installed that included the upgrade to Win 10 Pro. I used Macrium to move a software image from an older Dell XPS desktop running Win 10 Pro to the Optiplex. This Windows 10 Pro version was an upgrade from Win 7 when MS made their free upgrade offer. After some adjustments, Win 10 Pro runs just fine. However, I now receive messages to activate Windows.
I did receive a DVD with Win 10 Pro on it with the computer. The DVD envelope does have a long character string on it but the activation process says it's the wrong format and suggests I go to the MS Store and buy an activation code.
Can anyone suggest a better solution for my problem?