Applies To: Windows 8, Windows 8.1, Windows Server 2012, Windows Server 2012 R2 This section talks about things to consider when installing and deploying Windows on Unified Extensible Firmware Interface (UEFI)-based PCs. What is UEFI? When the PC starts, the firmware interface controls the booting process of the PC, and then passes control to Windows or another operating system. UEFI is a replacem