my network looks like this: the modem connects to a D-Link DIR-655 which connects to a computer (Vista) and a switch, the switch then connects to another computer (Win7) and an xbox.
the problem is that the vista computer will randomly connect and disconnect from the internet/network. The vista computer also generally runs very slow on the internet. The Win7 computer runs perfectly and there is never an issue, so I'm wondering if the problem has to do with the vista computer not being connected to the switch?
It is not an issue with the router, I have tried two already and the same issue occurs.
the vista computer is running with a Gigabyte GA-EP45-UD3R which has a Realtek 8111C LAN chipset.