Ususally to get into teh BIOS it is F2, del or something like that on boot. YOu really need to get on to toshiba to ask them as it is tehir laptop they should know, or at least tehre will be documentation about it.
Thank you a ton for your answer.I had try to access the Bios from that instance but looks like that option is preconfigured and blocked. But I have tried from PC properties and then sistem performance and seems like I got what I want. However I will follow your advice and contact Toshiba people. Thanks again.