Insert the disc in the drive, shut the laptop off, then press the start button. As soon as the screen starts press and hold the F12 key on the top of your keypad.The laptop will either show a message on the bottom of the screen or start to beep repeatedly, release the F12 key. This will bring up a boot screen that lets you choose what drive you want to boot from. Use the down arrow on the keypad to select the CD or optical drive that you have the Linux boot disc in and then press enter. Laptop will boot from the drive you selected