Windows 10 is authorized using a digital key linked to the hardware signature. Assuming this laptop has been connected to the internet and used in this manner, then the initial product key is still associated with this hardware signature. You can use product key retrieval software but the product key is not necessary. Unless there is some special reason to know the original key, it is not needed for most things. As stated, Windows 10 uses a digital key and does so by connecting thru the internet.
I'm not an HP employee.
Did this message answer your question? Please indicate below as an Accepted Solution!
Did you find this message useful? Click on the "Was this reply helpful" Yes button.