This question already has an answer here:
I have a legitimate Windows 10 key, which I got from Microsoft Imagine as part of being a student at my school.
I have previously used the key 1 time on another computer of mine and successfully upgraded it from Home to Pro.
Now I am trying to upgrade my other computer from Home to Pro, using the same key.
I have tried this through the Microsoft Store app, where it says install and allows me to enter a product key. It then tells me to hold on and that it is preparing for the upgrade.
Briefly afterwards it restarts my computer, but my windows edition is still Windows 10 Home.
I have also tried to enter the key through the control panel, but with the same result.
Can this key only be used to upgrade a single computer?
It seems it should tell me earlier in the process then. After all it acts like it is upgrading and even restarts to finish the upgrade.
Any ideas why this doesn't work? I would like to upgrade to the Pro edition to enable Hyper-V.
Thank you in advance for your help.
Regarding the duplicate claim.
Moab I would argue it isn't a duplicate as this key was not from the same source. As Joel Coehoorn specified in his answer there are different types of keys. The error message in the link you gave is also an error I never got. Meaning that the behaviour response from Windows was different.