Do you need to change your product key so you can activate Windows 8 properly? After installing Windows 8, you’ll find that there is no option to enter a product key under Computer properties. Or, at least I did not see it. Luckily, the good old Command Prompt and slmgr.vbs tools came to rescue. Just follow this tutorial to change Windows 8 product key using Command Prompt and slmgr.vbs.

How to Change Windows 8 Product Key?

1. Move the mouse cursor to the bottom right corner of the screen, click the Search icon.
2. Type in cmd in the search box, then right-click on the “Command Prompt” icon on the top-left of the search result page. A tick sign appears on the icon.

   

3. Click on the Run as Administrator icon from the bottom options.
4. Once the command prompt is launched with administrator privilege, run the following command to enter your product key:
   slmgr.vbs -ipk {insert your product key here}

   

5. Then run the following command to activate Windows after changing the key:
   slmgr.vbs -ato
6. You will get a confirmation on product activated successfully.