Activation helps you to verify that your copy of Windows is genuine and it has not been on more devices than the Microsoft Software License Terms allow. It depends on how you got your copy of Windows 10, activation will use either a digital entitlement or a 25 character product key.
Lenovo Windows 10 Activation Key Overview
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Digital entitlement is a new method of activation in Windows 10 which does not want you to enter a product key.
If you want to activate windows 10 for the first time then you will need a valid product key to activate Windows 10 on a device that has never had an activated copy of Windows 10 in it.
You will also have to use a valid product key if you are installing an edition of Windows 10 which was not previously on the device. For instance, you will need a valid product key to install and to activate windows 10 Pro on a device which ad Windows 10 Home installed on it before.
While this installation is in process, you will be to enter a valid product key. After the installation is complete, Windows 10 will automatically be online. To check the activation status in Windows 10, choose the start button, then select Settings > Update and Security > Activation.
If you have brought a new device which is running on Windows 10, it will automatically activate when you connect your device to the internet. If the activation servers are busy, you may then have to wait a while for the Windows to activate.
To check the activation status, select the Start button, then select Settings > Update and Security > Activation.
In some of the cases, you may need to enter the Windows 10 product key which came with the device packaging, or if it is as a card or on the certificate of authenticity (COA) which is to the device.
If you upgrade to Windows 10 version by using the free upgrade offer and then made major hardware changes to your device, like replacing the motherboard, then Windows 10 may no longer be activated. Then you may call customer support.
Lenovo Windows 10 Activation Keys:
How you want to activate Windows 10 after reinstalling depends on how Windows 10 was originally on your device.
If you activated a free upgrade to Windows 10 or if you have brought and activated Windows 10 from the Windows Store, you have a digital entitlement for your device.
Features for Lenovo Windows 10 Activation Key
This means that you can reinstall the same edition of Windows 10 which your device has a digital entitlement for without entering a product key.
During the reinstallation, if you are to enter a product key, then select on Skip. Windows 10 will automatically activate online after the installation is complete.
But if you have previously and Windows 10 by using a product key, you will need to enter the product key during the reinstallation.