Face down? that means the part that faces you is now pointed down at the ground. If that's the case, just pick it up again. If you mean upside down, then try holding down control (ctrl) and pressing the down arrow on the keyboard. That's the default keyboard shortcut for the intel graphics software screen rotation to return to 0° (right side up). If that doesn't work, try doing ctrl up arrow, that's meant to flip it to 180°, although I may have them reversed, or if something else has flipped your screen, that should flip it back. If this doesn't fix it, then try checking the graphics properties in the Control Panel in the Start Menu.