The ornamental design for a settopbox, as shown and described.
FIG. 1 illustrates a perspective view of the set top box of the present invention;
FIG. 2 illustrates a front view thereof;
FIG. 3 illustrates a right side elevational view thereof, the left side elevational view is symmetrical to the right side elevational view;
FIG. 4 illustrates a top plan view thereof;
FIG. 5 illustrates an exploded view, in perspective, showing a removable face plate of the set top box of the present invention;
FIG. 6 illustrates a perspective view of the rear of the removable face plate of the set top box of the present invention;
FIG. 7 illustrates a front view of the removable face plate of the set top box of the present invention;
FIG. 8 illustrates a cutaway view of the face plate as installed on the set top box of the present invention; and,
FIG. 9 illustrates a perspective view of the set top box with the control unit shown separated from the chassis of the set top box of the present invention.