This is the core OS image that powers Windows IoT platform on Raspberry Pi 2. Windows 10 IoT Core is the smallest version of the Windows 10 editions that leverages the Windows 10 common core architecture. This edition enables building low-cost devices with fewer resources. Development for Windows 10 IoT Core leverages the Universal Windows Platform.
Windows 10 IoT Core for Raspberry Pi 2
Windows 10 (Build 10140 or higher)
Learn about other system requirements here.