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 a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a perspective view thereof with the combiner in a close state;
FIG. 9 is a right side view thereof with the combiner in a titled state; and,
FIG. 10 is a front view thereof with an image projected on the combiner.
The dot-dashed broken lines represent a boundary of the claimed design and form no part of the claimed design. The dashed broken line showing of portions of the notebook computer is for the purpose of illustrating unclaimed portions of the notebook computer and forms no part of the claimed design. The dashed broken line showing of the image on the combiner in FIG. 10 forms no part of the claimed design.