Computer Fan

FIG. 1 is a front-right-top perspective view of the computer fan showing my new design; FIG. 2 is a front elevational view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a left side elevational view thereof; FIG. 5 is a right side elevational view thereof; FIG. 6 is a top plan view thereof; FIG. 7 is a bottom plan view thereof; and, FIG. 8 is a perspective view from another angle of view thereof. The broken lines in the drawinos depict portions of the computer fan that form no part of the claimed design.