Windows 10: Digital product key

I mgrated from [by force] from windows 8 to windows 10 sgle home language. I did not received a digital product licence key. I am experiencing some blue screen trouble. Where do I find my digital licence key or must I buy Windows 10 again after the migration?

:)

 

Digital license & product key details

• Hi, I'm running Windows 10 already and received an upgrade notification from Microsoft but can't install it because I don't have the Product Key or Digital Licence details

 

Activate windows 10 after re-installing (I have lost my product key)

I own a Lenovo T430 laptop. In 2017, I installed Windows 10 using my original Windows 7 product key. Unfortunately, I cannot find that product key anymore. I need to re-install windows 10. Will it be automatically activated after the installation, if I skip the step of asking the product key during the installation?

In my opinion, I believe that my laptop will have a digital entitlement stored on the Microsoft Activation Servers and this will not be a problem. Is that true?

If not, please suggest me a solution or a workaround.

 

Product key not recognized

I want to thank everyone for taking the time to respond to my query. I have to say some of the suggestions assume a tech capability beyond me.

I think I will find the original receipt, go back to the shop, and ask them for the Product Key, then try again. I suspect it was an unauthorized copy. Maybe that will work.