Windows 10: Clean Windows 11 Pro install will not activate. Had Windows 10 Pro installed.

I had Windows 10 Pro installed on my computer. upgraded from a physical Windows 8.1 copyI did a clean install of Windows 11 Pro.Now my Windows 11 Pro will not activate despite being logged in with my Microsoft Account.I figured that I had to remove my previous device containing the Windows 10 Pro installation from my Microsoft Account.This didn't work and now I'm afraid that I lost the Windows 10 Pro license linked to my Microsoft Account.How can I activate Windows 11 Pro on my computer?Error Code: 0x803FABBA

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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.

 

Clean Windows 10 (?PRO?) install

Where exactly did you get this "windows pro" key from? If it's off eBay or something, then perhaps you've been sold a dud key. Also, it's not clear if you mean you bought windows 10 pro or an earlier version of windows as there's no such thing as "windows pro".

Do you have an Windows 7 or 8.1? If so, install that, download the ISO with the media creation tool and burn it to disc. Then run it as an upgrade. After that, the components hash of your PC will give you a digital entitlement for a clean install, so just bought off that disc, wipe the partitions and install it clean. It will auto activate over the internet once installed.

 

Clean Windows 10 (?PRO?) install

As far as I am aware there is no Windows 10 Pro version.
But I'd be happy to be wrong.