Windows 8 Pro Pack

To install Windows 8 Pro Pack, you must be running Windows 8. Internet access fees may apply. Prices shown are estimated retail prices; actual price may vary by retailer. If you purchase a new PC with Windows 8 pre-installed and you later upgrade that PC with Windows 8 Pro Pack, Windows 8 Media Center Pack, a volume license edition, or a retail edition, you will no longer be able to install apps that are provided exclusively from your PC manufacturer through the Windows Store.