Windows 10: REMOVE PRODUCT KEY FROM IMAC TO USE ON LAPTOP

I am trying to remove windows 10 from my imac i bought license from Microsoft installed it but now want to install it onto my laptop ,try to follow instructions regarding apple bootcamp ,when i get into dos to enter code to remove license i am stuck because i cannot input dos code .any help would be appreciated thanks

:)

 

iMac Bootcamp Product Key Problem

So I had an iMac that had Windows 10 downloaded via Bootcamp. I no longer use that iMac and instead, use a computer with inactivated Windows. The iMac Bootcamp had a product key I bought from a store and I want to remove it, but I lost the boot drive to
get into Windows on the iMac. Could I just delete the Windows Bootcamp partition on the hard drive to remove the existing device that uses the product key?

 

Remove account

I suggest you backup your personalized files first before removing the account.
To delete an account, follow these steps:

1. Press WIN + X keys and click Command Prompt (Admin) from the menu.
2. Type the following command and press Enter. Replace test with the name of your sister's account. Code:

 

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.