A method for deploying an operating system onto a client system includes, with the client system, receiving a bootloader image from an external device in response to a request for the bootloader image and installing the bootloader. The main board may include a master optical transmittingreceiving controlsupervising section and the sub board may include a plurality of optical transceivers and a slave optical transmittingreceiving controlsupervising section. A user may then be woken more comfortably at a desired waking time and during a preferable stage of the sleep cycle.