Gymcap, I moved this to its' own thread because it is specific to the hardware.
There is no way we can help you unless you provide more information. If it is a separate piece of hardware (example a USB adapter) then we need to know the make & model of his network adapter. If the adapter is built in to the motherboard then we need the make & model of the computer or if it is a custom built desktop then we need the make & model of the motherboard.
Most drivers are written by the manufacturer, not by Microsoft, so they are found on the manufacturer's website.