The ornamental design for a desktopcomputingdevice, as shown and described.
FIG. 1 is a perspective view of a desktop computing device;
FIG. 2 is a front view thereof;
FIG. 3 is a back 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; and,
FIG. 8 is a perspective view thereof wherein the lid is removed.
The broken lines shown in the FIGURES are for environment only and form no part of the claimed design. Non-oblique line shading is meant to show contour and not surface ornamentation.