How to activate Windows 8 Enterprise ? 

1. Press Start button ( from the keyboard ) / and type cmd :

2. Select the Command Prompt and click on the Run as an administrator :

3. Type: slmgr.vbs -ipk “WINDOWS-8-ACTIVATION-KEY” 
*Replace “WINDOWS-8-ACTIVATION-KEY” with your Serial Number 

If you have problems don’t hesitate to comment / contact me. 

Enjoy !