Information processor having multi OS and its OS update method

摘要

The present invention provides an art that can update an OS (Operating System) of an information processor efficiently. An OS update method that updates the OS installed in the information processor has the steps of determining whether an update of a front end OS that controls usual application processing is necessary, terminating the processing of the front end OS in operation and switching the control of the information processor to a back end OS, acquiring update data for updating the front end OS in the latest state under the control of the back end OS when it is determined that the update of the front OS is necessary, updating the front end OS in the latest state, and restarting the updated front end OS in the latest state.