  We compute the magnetic susceptibilities of interacting electrons in the
presence of disorder on a two-dimensional square lattice by means of quantum
Monte Carlo simulations. Clear evidence is found that at sufficiently low
temperatures disorder can lead to an enhancement of the ferromagnetic
susceptibility. We show that it is not related to the transition from a metal
to an Anderson insulator in two dimensions, but is a rather general low
temperature property of interacting, disordered electronic systems.
