A method for updating software on an electronics system that includes a processor switchable between modes and non-volatile memory includes over-writing original application software stored in an application sector of the memory to store cloned boot software such that original boot software remains in the memory, switching the system to a mode that accesses the cloned boot software, storing a temporary key in a key sector of the non-volatile memory that overrides an original key and is configured to instruct the processor to boot the cloned boot software upon initialization, over-writing the original boot software in the boot sector to store new boot software after storing the temporary key, storing a new key in the memory that is configured to instruct the processor to boot the new boot software upon initialization, erasing the temporary key, and switching the system to a mode that accesses the new boot software.