Patent ID: 11256519

Abstract:
As an example, a computing device having a Unified Extensible Firmware Interface (UEFI) may boot into a preinstallation environment (associated with a first operating system), determine that a second operating system is to be installed on the computing device, and write an image of the second operating system to the boot disk. The image may include a special partition. The computing device may write the preinstallation environment (associated with first operating system) to the special partition of the image of the second operating system, and create a boot entry in the UEFI to cause the computing device to boot into the preinstallation environment (Windows PE). After booting into the preinstallation environment, the computing device may execute one or more diagnostic tests, delete the boot entry, and reboot the computing device to install a basic input output system (Coreboot) to replace UEFI and install the second operating system (Chrome OS).