You would need to find and download the correct drivers for your NIC Card
Or if it is a NIC built in to the motherboard, then the driver for that
For all this you need the Make of the Computer, The Make of the NIC Card
You can then go to the proper web site to get the drivers .. it may also
be on a cd that came either with the card or with the computer
Also, if this is an Onboard or built in NIC card, check to be sure it is enabled
in the BIOS