Windows 10: Windows 10 Pro product key on old laptop not working on new laptop

In 2015, I upgraded my old laptop from Windows 8.1 Pro to Windows 10 Pro via the free upgrade that Microsoft provided. My old laptop had an OEM 8.1 Pro key, and thus the 10 Pro key was a genuine product key, direct from Microsoft.Fast forward to the day this post is made; I have a newer and much more powerful laptop than my old one. I decided to take the 10 Pro product key from my old laptop and use it on my new one the new one had an OEM Windows 10 Home key. I deactivated the 10 Pro key on my old laptop and upgraded my new laptop from 10 Home to 10 Pro. However, I cannot get that key to act

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Transfer Windows 10 Pro product key from old laptop to new laptop

Hi,

I currently have an old laptop that is running Windows 10 Pro and is activated, I would like to no longer use this laptop and transfer this product key (digital license) to my new refurbished laptop that is also running Windows 10 Pro. I have tried to find
my product key (digital license) but cannot find anywhere. Please advise how I can obtain so I can activate my new (refurbished) laptop.

Thanks

Chris

 

Product Key from old laptop

So it seems my new laptops windows isn't genuine. I thought about buying a new copy of windows but then remembered I have this old laptop with its product key still available (but the laptop is demolished), cant I use the product key of the old laptop
to activate windows on my new laptop?

 

Transfer Windows 10 pro from old laptop to new laptop

Hello all, If I would take the product code out of the old laptop that has Windows 10 pro would I be able to change the product code of the new laptop to bring the Windows 10 up to Windows 10 pro and if I can, how does
one take the code out of the old laptop so that I may be able to put it in the new laptop...