Activate Windows using the Windows product key provided with the appliance. The Product Key sticker can be found on the top of the server. For more information, see What's in the Box.
Right click the Start button, and then click System.
The Settings page is displayed.
Under Windows specifications, click Change product key or upgrade your edition of Windows.
The Activation page is displayed
Click Change product key and then follow the prompts to change the Product key provided in the sticker.