Secure boot is a security standard developed by members of the PC industry to help make sure that a device boots using only software that is trusted by the Original Equipment Manufacturer (OEM). When the PC starts, the firmware checks the signature of each piece of boot software, including UEFI firmware drivers (also known as Option ROMs), EFI applications, and the operating system. If the signatures are valid, the PC boots, and the firmware gives control to the operating system. For more information, see Secure boot. Access to UEFI settings is only possible through attaching a physical keyboard and mouse. This prevents being able to access UEFI via the Valarea Room touch-enabled console as well as any other touch-enabled displays attached to Valarea Room.