Sorry, should have given a bit more info really.
On my own (current machine) I have no router/switch - It's quite literally a crossover cable betweent the PC and modem. No firewall and (i can hear the 'WOT's from here) no antivirus software.
Literally does nothing, nadda - sits lookin at you (like its tryin real hard). End up closing the cmd window and bouncing the modem. It always comes back no problem.
PS - I have a knack of finding weird problems like this. Usually I get to the bottom of them, eventually
