The ornamental design for a notebookcomputer, as shown and described.
FIG. 1 is a front 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;
FIG. 7 is a bottom plan view of the notebook computer of FIG. 1;
FIG. 8 is an open perspective view of the notebook computer of FIG. 1;
FIG. 9 is a is a partial enlarged view of FIG. 1 that is included to more clearly depict the design from the front perspective view (a-a′, b-b′, c-c′, d-d′) of FIG. 1; and,
FIG. 10 is a is a partial enlarged view of FIG. 8 that is included to more clearly depict the design from the open perspective view (e-e′, f-f′, g-g′, h-h″) of FIG. 8.
The dash-dot-dash broken lines immediately adjacent to the shaded areas and solid lines in the design represent an unclaimed boundary of the design while all other remaining features shown in broken lines in FIGS. 1-10 are shown for environment only and form no part of the claimed design.