We study one and two point microrheology of a 2D dense colloidal silica dispersion. Due to hydrodynamics interactions with the sample bottom wall, the two point mean square displacement does not follow the regular asymptotic behavior. Taking into account the actual hydrodynamic interactions between the beads and the wall we are able to extract the elastic properties of the fluid, as well as the distance of the suspension from the wall. We use the same experimental framework to analyze the mechanical properties of actin networks with different distributions of filament length. We find that the filament length distribution affects the one point microrheology far more than it affects the two point microrheology.