Some install Limewire or other software that starts using the internet even when the machine is just "on." I'd scan with the tools our forums note at this sticky -> http://forums.cnet.com/5208-6132_102-0.html?forumID=32&threadID=238606&messageID=2432058
I am running a two computer home (ethernet not wireless) network with a Lynksys WRT54GS router connected to a Motorola cable modem. My internet provider is Charter, and I subscribe to a 5 meg download speed.
One computer runs Win XP Pro, the other Win XP Home.
My computer is the Win XP Pro, my wife's is the XP Home. When her computer is on, the Bandwidth meter speed test on Cnet is 70-400 kbps. When I shut her computer off, the speed on my computer jumps to 2000-2400 kbps.
Why would there be such a difference even with nothing running on her machine except the screen saver?
Also, with a 5 meg connection, should I expect faster speeds?