Once your in the bios you should be able to scroll left to right using the arrow keys. As you scroll through the bios there should be a section called "boot priorities" or something similar. From there you should see a list of devices that your laptop can boot from(hard drive, DVD player, etc). Usually you should see your hard drive being the first bootable device and then you should be able to click a key that changes its priority. All keys and what they do are listed on the bottom of the screen.