Windows 10 Error 0x004e016 bootcamp

[fedexhusky]

Hi guys, I have a Win7 product key installed on my old macbook via Bootcamp. Now I installed win10 but when I use my product key I receive the error 0x004e016 and I get the message "Activate Windows"

 

[kemical]

Hi,
this is because the way Windows is activated has now changed. See this thread:
Windows 10 Activation explained..

 

[fedexhusky]

So do I have to downgrade again to win 7 in order to upgrade it again from the system?