* To install Windows 8 Pro Pack, you must be running Windows 8; to install Windows 8 Media Center Pack, you must be running Windows 8 Pro. Internet access fees may apply. Prices shown are estimated retail prices; actual price may vary. Additional hardware may be required to watch and record live TV with Windows Media Center. Learn more. If you purchase a new PC with an addition of Windows 8 preinstalled 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.