The ornamental design for a notebookcomputer, as shown and described.
FIG. 1 is a top perspective view of a notebook computer;
FIG. 2 is a front view of the notebook computer of FIG. 1;
FIG. 3 is a rear view of the notebook computer of FIG. 1;
FIG. 4 is a left-side view of the notebook computer of FIG. 1;
FIG. 5 is a right-side view of the notebook computer of FIG. 1;
FIG. 6 is a top plan view of the notebook computer of FIG. 1; and,
FIG. 7 is a bottom plan view of the notebook computer of FIG. 1.
The dash-dot-dot-dash broken lines immediately adjacent the solid-line portions of the design represent unclaimed boundary of the design. Features shown in broken lines in FIGS. 1, 2, 3, 4, 5, 6, and 7, form no part of the claimed design.