During a clean installation of Windows 8.1, you wont be able to use the genuine Windows 8 license key to proceed with the installation. If you already own a Windows 8 license Key, here’s how you could activate Windows 8.1 easily.

While performing a clean installation of Windows 8.1, you will be asked to enter the product key. Although the installation won’t proceed with a Windows 8 product key, Windows 8 Genuine product key could be used to activate Windows later on.

Activating Windows 8.1 with Windows 8 License Key

After booting up Windows 8.1 installation from your connected drive, it would ask you to enter the product key.

At this point, you could use the following product keys to proceed with the installation.

Windows 8 Professional: XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB
Windows 8 Core: 334NH-RXG76-64THK-C7CKG-D3VPT

Once the installation gets completed, you may Press Windows Key + X to bring up the Quick Access Menu and choose ‘System’.

Windows 8.1 Quick Access Menu

On the upcoming window, you will see a message being displayed as windows is not activated. Click on the link and you’ll be asked to enter the product key.

Now enter the Genuine Windows 8 Product key and Windows 8.1 will now be activated.

Windows 8.1 Activated with Genuine license key

Adding Media Center Feature to Windows 8.1

If you have the key to activate Media Center feature in Windows 8, you could get this feature on Windows 8.1.
For this, click the ‘Windows Update’ link in the left sidebar of the ‘System’ Window and then click ‘Add features to Windows 8.1’.
Choose ‘I already have a product key’ in the upcoming window and enter the product key you’ve received for Windows Media Center and Proceed.

Adding features to Windows 8.1
After entering the key correctly, Windows will display that the key works.

Adding Media Center feature to Windows 8.1
Now proceed to the next Window, check ‘I accept the license terms’.
Click on ‘Add features’ and Windows Media Center feature will be added to Windows 8.1.

Also CheckEnabling Features in Windows 8

Amal Roy is the Founder-Editor of Computing Unleashed. A Technology Enthusiast, Windows Adept and a Proud Geek!