Windows Software Development Kit for Windows Store Apps (PN)~ An SDK that contains everything for a developer to create an app for the Windows Store. It is a subset of the complete Windows SDK. This allows developers to stick with APIs that are safe for applications that would appear in the Store and are focused towards core app scenarios. Windows Software Protection Platform (n)~ A technology that reduces software piracy by requiring that each installation of a Windows product be activated with Microsoft either through the Internet or by telephone. A unique product key is required for each installation of Windows but Microsoft does not request or collect any information other than the Product Key during the installation. The end user may reinstall Windows using the same Product Key on the same computer as many times as necessary but it cannot be used to install Windows on another computer. The end user can make incremental hardware upgrades to the computer. However if the hardware is significantly altered the end user will be required to reactivate the installation of Windows.