Basic Input/Output System (BIOS) is system-level software that begins your boot process. It is tightly integrated with your hardware and checks to make sure that all systems and components are running properly. Accessing the BIOS differs by computer, but in most cases, it requires a simple key combination during start up. For Toshiba laptops, there are a few keys that should work for nearly all systems.
Completely shut down your laptop. To access the BIOS you need to view the start-up screen.
Turn on your laptop. Press and hold one of the following key combinations when the boot splash screen (the screen with the Toshiba logo) displays: for the Toshiba Protege, use the "Esc" key; for the Toshiba Satellite, use the "F1" key; for the Toshiba Tecra, use "Esc" then either "F1" or "F2." If one of these do not apply (which may be the case for newer models), boot up by pressing the power button and the "Esc" key simultaneously. Hold them down until "Check System, then press [F1] key" displays. Release the "Esc" key and press the "F1" key.
Exit the BIOS by pressing the "Esc" key and choosing whether or not to save changes. If this does not apply, find the exit menu button on the main BIOS screen.