Windows 8 Sideloading Requirements (from TechNet)

Windows 8 Sideloading Requirements You can sideload LOB Windows Store apps apps on devices running Windows RT and on devices running Windows Server 2012, Windows 8 Enterprise, or Windows® 8 Pro. You can’t sideload LOB Windows Store apps on any other editions of Windows in your enterprise. However, you can use a developer license to add apps that are…