Windows 10: How do I get a windows 10 product key from an old ssd

I have an old ssd with windows 10, I took it out of my computer and threw away my computer, now I have my ssd and am in windows. how do I figure out the product key?

:)

 

Product key association disable on old pc

Hey,


I sold my old pc to a friend. He installed some missing parts (HDD, GPU and RAM). Then we installed Windows 10 Home 64-bit version from USB stick. I was surprised to see that windows was automatically activated after that. I did some digging and found out that it is using my product key, which i use now in my own new pc. My friend does not have his own product key, the idea was that he just uses the unactivated windows with limited features.


I uninstalled my Windows 10 product key via command prompt in friends computer (as i understand this is only local solution, if he reinstall windows or clicks the active button, it reactivates automatically with my product key) and now it says windows is not activated, but my product key is still shown with Produkey app in his pc. So far windows is still activated my own pc.


My questions:

1. Is this all i need to do?
2. How do i get rid of product key showing still with product key showing apps on my friend's computer?
3. Is there a way to get rid of association of my product key on that old pc that i sold to friend?

EDIT: I originally installed windows 10 via upgrade option from Windows 7, if that matters.

 

windows 10 key

Thanks but I don't want to do any decrypting. I want to download a Win 10 ISO from Microsoft and install it using my Win 8 key. No other steps required. Is that possible?

 

Windows 10 product key

My Windows 10 was installed on an SSD and long story short my SSD fail so i replaced it with a new one, i removed the old SSD with everything in it without delleting or uninstalling it because i think the SSD couldn't handle the processes anymore and i asked
the official service center of my Laptop to reinstall my Windows 10 along with my new SSD, but when it finished it came out with a different product ID which is no longer the original OEM ID, now i think its a retail ID and i managed to get the product key
using third party software named produkey and it shows 2 product key the first one named Windows (BIOS OEM key) and the second one is named Windows 10 Home Single Language, the one being used is the Windows 10 Home Single Language key, the only Hardware change
is the new SSD and i removed one of the two memory module before i submit my Laptop to the service center.

My question is :

1. can i change/reuse my OEM key again? i if could how should i do it ?
2. if i managed to use my old OEM key then what would happen to the currently installed key ? could i use it to other PC ?
3. from the Settings > Updates & security > Activation said my Windows is activated with a digital license linked to your microsoft account, so if i used the OEM key again could i link it to my microsoft account ? could my microsoft account linked to more
   than one digital license ?