Windows 10: What can I do when I accidentally deleted my Windows 10 Pro product key?

Hello. My name is Peace and I accidentally deleted my windows 10 pro product key. 2 days ago, notification popped up. It was about my windows activation will expire pretty soon. And I did not know what that was all about. So I asked my mom about the product key, and she said she don't know, and you can just format it. I did not wanted to do everything again from the beginning so I searched it online. And I successfully found how to find my product key. A little later I tried to activate it with the key that I found out. But it was not Activating at all. So I asked it about my frien

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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?

 

Installing Windows 10 using Windows 7 key

Nope, you need to install Windows 10 first and make sure the Windows 7 key is transferred to your Windows account after you've installed Windows 10 (not quite sure how that works). I missed the last step and I could not activate Windows 10 after a re-install... Microsoft seem to have done everything they can to make it a PITA. Also, it's technically too late to do this now anyhow, as the upgrade offer has expired. But KMSPico works quite well...

As for getting rid of Windows, delete the Windows folder.

 

Why was I not asked for a product key when upgrading to Win 10?

According to your spec you have Win 10 Pro, but perhaps that doesn't reflect your PC.

You haven't stated which edition of Win 10 you have on this machine, nor what your Win 10 key is for.

For example, if you already have Win 10 Pro and your key is Win 10 Home, that would be a retrograde step.

For interest only:
Change Product Key in Windows 10

More on product key if you search this list or look at 'Related Tutorials' in the above.
Windows 10 Tutorial Index