Last week, i had 20 devices, mostly xp machines, with current updates etc, all machines could see each other in network neiborhood, each having something shared, nothing was altered, but all of a sudden, no machines can see another, they ping by unc, by ip, can map drives through command, access shared files that are mapped, but can not view???
this network has been stable and working for years, cant understand how it could get so messed up overnight?