Have first problem with SP1, since installing the cannot get the Motorola Cable Moden to start up like it used to. I must now unplug the modem when I shut down the pc, then turn on the pc and then the modem, thats the only way it will boot up. Hope this makes sense to you. I use Sygate Home Network, they say not thier problem. I've heard of others having same problem, but does any one know of a fix for it? thanks very much.