Step 1: Right-click on the start button and open Command Prompt (Admin).
open windows command prompt with admin rights
Step 2: Use the command “slmgr /ipk yourlicensekey” to install a license key (yourlicensekey is the activation key you got above).
(Note: You need to hit [Enter] key to execute commands.)
Step 3: Use the command “slmgr /skms kms8.msguides.com” to connect to my KMS server
Step 4: The last step is to activate your Windows using the command “slmgr /ato”.
Check the activation status again.