Windows 10: Activation of 10 Pro w/ license key when I installed 10 Home doesn't work

I used the media download page to download Windows 10 21H1 and installed it. Did not change any hardware or anything. I had purchased a license key online which worked before, now when I go to activate Windows with that key, it does not work and gives an error 0xc004f050. Under the Activation page, there is no way to to Add An Account or anything I have seen mentioned in various places to try activating.So, I want to be able to use Windows 10 Pro license key that I have purchased it was previously activated so I know it works, and no hardware changed, I just did a clean install from USB a

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Activation of Windows 10 Pro doesn´t work

Hallo, i can´t activate my windows 10 Pro (free upgrade from windows 7);

Info: 0xC0EA000A

Manual activation doesn´t work either.

Important (i think): I had to re-install windows 10 (3 or even 4 times). because I had massive problems with "Start and Cortana Issues".

I hope, I don´t have to search the old product key.

PS. Yes, Windows 7 was genuine.

 

Installing Windows 10 using Windows 7 key

Nope, you need to install Windows 10 first and make sure the Windows 7 key is transferred to your Windows account after you've installed Windows 10 (not quite sure how that works). I missed the last step and I could not activate Windows 10 after a re-install... Microsoft seem to have done everything they can to make it a PITA. Also, it's technically too late to do this now anyhow, as the upgrade offer has expired. But KMSPico works quite well...

As for getting rid of Windows, delete the Windows folder.

 

Clean Windows 10 (?PRO?) install

I have bought a legit "Windows 10 Pro" key of a key website. It is legit since i'm currently using it for over a year now. I currently have Windows 10 Pro installed on my PC and I want to do a clean install. I just can't find the windows 10 Pro download in the tool. But if i could use a windows 10 pro key with a normal windows 10 install, I'll be good to go.