FIG. 1 is front view of my new and ornamental design for a computer dolly;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left front perspective view thereof;

FIG. 6 is a right front perspective view thereof;

FIG. 7 is a rear right perspective view thereof; and,

FIG. 8 is a rear left perspective view thereof.