Windows 10: Retrieve original Windows product key from MSI laptop

I bought an activation key for Windows 10 Pro from an eBay auction. It looked legitimate, but wouldn't activate. Now my Windows is no longer activated. I know. I'll never try this again.How can I retrieve my original Windows product key?

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Lost Original windows Product Key

I gave my laptop to my Cousin to use for some reason he uninstalled the Original windows 10 and Installed windows 7.. Now i lost all my drivers my Factory reset option and my original Product key. So is there a way to retrieve the same?

 

Help retrieving Microsoft Office 2013 product keys.


I need help on retrieving a microsoft office product key.

I'd upgraded my sister's laptop from Windows 7 to Windows 10 without saving any of its files (clean install). Now I was told that she does not know her microsoft office keys.

Is there any way for me to retrieve the keys? It's a student key which was given by her Uni and she does not keep the keys.

 

Retrieving original activation key for windows


Just FYI, what is listed as "Windows 10" on the Media Creation Tool is multi edition. It can install Home or Pro. If an embedded key is detected it will auto match the edition and you won't be asked to select Home or Pro, or be asked for a product key. If no key is detected, or the key is for a version not supported by that ISO, you'll be prompted to select Home or Pro, and enter a key. For the current latest build anyway. Older builds would not use Windows 8/8.1 keys.