The ornamental design for an all-in-one computer, as shown and described.
FIG. 1 is a front perspective view of an all-in-one computer, showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a back perspective view thereof;
FIG. 5 is an enlarged view of the encircled area shown in FIG. 2;
FIG. 6 is an enlarged view of the encircled area shown in FIG. 3;
FIG. 7 is a rear view thereof; and,
FIG. 8 is a bottom view thereof.
The evenly spaced broken lines immediately adjacent to the claim represent the bounds of the claimed design, while all other evenly spaced broken lines are directed to environment; the broken lines form no part of the claimed design. In addition, the dot-dash broken lines encircling portions of FIGS. 2 and 3 are for the purpose of illustrating a partially enlarged view and form no part of the claimed design.