LimeWire runs great on my machine. I can DL at 700KB/s and edit Photos in Adobe at the same time. Or cruse the net or anything else I want to do. The only time it will slow down the net is if I let it get up around 800KB/s then it isn't slowing down the net it is using all of the available bandwidth. So none is left for the net. And Quite frankly I haven't seen to many P2P aps that can use all of my bandwidth. But LimeWire can.