If you wish to enter the BIOS on your tablet, first, please be sure that the tablet has been turned off. Next, turn on the tablet. When you turn on the unit, once the screen has displayed the RCA loading screen (the black screen with RCA logo) simply press "esc" on your keyboard. The tablet will then take you the BIOS. To exit BIOS: Simply press "esc" and confirm whether you wish to save any changes you have made or not. Please note that by changing the setting of the BIOS or the operating system of the tablet will void the manufacturer's warranty of the unit.