Patent ID: 8949813
Filing Date: 2015-02-03
Classification: G06F

Abstract:
1. A method of preparing a replacement operating system (OS) on an information handling system for activation on the information handling system using certificate of authority information, comprising: providing an information handling system comprising: providing a replacement BIOS code to replace the first BIOS code, the replacement BIOS code being different than the first BIOS code and being configured with the correct certificate of authority information corresponding to the replacement OS; providing BIOS updater code that includes the private security key, the BIOS updater code being either separate from the replacement BIOS code or part of the replacement BIOS code; installing the BIOS updater code and installing the replacement BIOS code on the information handling system to replace the first BIOS code, the replacement BIOS code including updated correct certificate of authority information; then executing the BIOS updater code on the processing device to provide the private security key from the BIOS updater code to the installed replacement BIOS code; then executing the replacement BIOS code on the processing device to: then executing the BIOS updater code on the processing device to call the replacement BIOS code to cause locking of the unlocked memory space in the non-volatile memory after installation of the updated correct certificate of authority information in the unlocked memory space in the non-volatile memory; and then executing the replacement BIOS code on the processing device to cause locking of the unlocked memory space in the non-volatile memory in response to the call received by the replacement BIOS code from the installed BIOS updater code.