Windows 10: can't activate my windows, previously on windows 10 pro

got a new pc because my old one broke, it was on wins 10 pro. i previously attached it to my account because of the digital license thing. got my new pc today and i was so happy and had no issues with anything except for everything literally on microsoft side. sign in issues blah blah blah. anyway, the pc was on wins 11 and i tried activating it and it didn't work. downgraded to 10 and it still didnt work. in my microsoft acc, it literally says i have a wins 10 pro on a device, but for some reason it doesn't activate here

:)

 

Windows 10 Activation (Insider)

I bought Windows 7 Pro OEM key from G2Play.net for 12€ to upgrade to Windows 10 Pro - worked like a charm but be advised if you buy a OEM key you can not download the Win 7 iso from microsoft and have to get it elsewhere.

 

Windows 10 pro

I need to change my motherboard, have windows 10 pro. When i google how to it says go to activation then add an account, my issue is there is no add an account option under activation? Or am I in the wrong window?



Not sure how to proceed, ive googled it and the same results. Do I have an OEM or? On the disk sleave it says OEI DVD?
The COA says windows 10 pro for OEM software

 

Windows 10 Activation (Insider)

How long did you wait for activation?
When I re-installed with a fresh install... it took a few hours to sync and activate.
However, it did, finally, activate.