Windows 10: Product Key for Digital Upgrade

Trying to activate Win 10 Pro (just upgraded from Win 10 Home) to create an admin account. MS says it's in the receipt, but then says elsewhere if it was a digital download, you don't need one and just click on that option. Sorry, not seeing an option to continue withot a product key. Please, anyone?

:)

 

Win10 Home to W10 Pro Upgrade Error using Product Key

The keys are there because 1. It is the product key you end up with when you gain a digital license for Windows 10 Pro through legitimate means and 2. When you do a clean install of Windows 10 (without adding an ei.cfg file), on a computer with a product key for Windows 10 Home stored in UEFI, you can use the generic product key to upgrade the Windows 10 Home that installs by default to Windows 10 Pro - but only if you have an existing digital license for that computer for Windows 10 Pro previously stored on Microsoft Activation Servers.

The reason the generic Windows10 Pro product key will not upgrade your Windows 10 Home to Pro is because you do not have a preexisting digital license for Pro for that computer stored on Microsoft activation servers.

 

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.

 

Cannot reinstall Windows 10 using Windows 8.1 product key even though I upgraded last year free from 8.1 to 10?

You do not need a product key to reinstall Windows 10 on an upgraded device. You have a digital license which will be activated online after installation. Skip the step that asks you to enter the product key.

Source: https://support.microsoft.com/en-gb/help/12440/windows-10-activation