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 a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof;
FIG. 9 is an enlarged view of an indicated portion of FIG. 1;
FIG. 10 is an enlarged view of an indicated portion of FIG. 2;
FIG. 11 is an enlarged view of an indicated portion of FIG. 3; and,
FIG. 12 is an enlarged view of an indicated portion of FIG. 6.
The dashed broken lines illustrate portions of the notebook computer and form no part of the claimed design. The dot-dash broken lines define the bounds of the claimed design and form no part thereof. The dot dot dash broken lines indicate portions of the figures shown enlarged and form no part of the claimed design.