It is not uncommon on a fresh install of Windows 7 for Network Controllers to show up in device manager under "Other Devices" if there is not a native device driver available for the particular hardware.
Some details regarding your particular computer Manufacturer Name, Model Name, Model Number, etc., or in the case of a custom build then perhaps some information on the Motherboard Manufacturer, Model Name, Model Number, Rev. Number, etc.,
might be helpful if the devices are integrated. If the network interface card is an add on then some specifics on it might also help.