Did you have any USB flash drives plugged in when this happened? Try entering the BIOS and setting the 1st boot device to your harddrive.
To do this, press the "Del" (Delete) key when prompted during first boot of your laptop. Sometimes this may be F12 or F9 and not the "Del" key. Then use your arrow keys to scroll to "Boot" and then "Boot Device Priority". Follow the instructions to set your first device as your hard drive. Press F10 to save and exit.