The ornamental design for a notebookcomputer, as shown and described.
FIG. 1 is a perspective view of a notebook computer showing our new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is another perspective view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a top view thereof;
FIG. 9 is a bottom view thereof;
FIG. 10 is an enlarged view of an indicated portion of FIG. 2; and,
FIG. 11 is an enlarged view of an indicated portion of FIG. 6.
The evenly spaced broken lines in the drawings depict portions of the notebook computer that form no part of the claim. The dash-dot broken lines surrounding detail views are for annotation purposes only and form no part thereof.