  The transmission of an excitation along a spin chain can be hindered by the
presence of small fixed imperfections that create trapping regions where the
excitation may get caught (Anderson localization). A certain degree of noise,
ensuing from the interaction with a thermal bath, allows to overcome
localization (noise-assisted transport). In this paper we investigate the
relation between noise-assisted transport and (quantum) computation. In
particular we prove that noise does assist classical computation on a quantum
computing device but hinders the possibility of creating entanglement.
