Windows 10: Windows 10 Pro key cant upgrade Windows from Home to Pro?

So I bought a Windows 10 Pro key on Ebay like 2 years ago for 5$. I used it to activate my laptops windows which was Windows 10 Home and as expected it upgraded it to Windows 10 Pro. Everything is working perfectly fine to this day.

I'm looking again for a key on Ebay and it says on some of these: "OUR KEY WILL NOT WORK FOR UPGRADE PURPOSE , WORK ON WINDOWS 10 PRO EDITION ONLY"

The PC im trying to activate also has Windows 10 Home and i want to upgrade it to Pro and I need to know if this is true and why would it be?

submitted by /u/persheshmefasule
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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

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

 

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.