start-settings-control panel-device manager
it MIGHT name a few of your things in there.
also the net drivers usually come on a motherboard install CD, or the standard reformat cd that comes with a store computer.
if its not on board ports and have their own card, and your missing the cd that came with them, use windows vista lol :\
vista tends to have/find those drivers for you. most times not even asking you to do so lol.
or physically look inside the comp itself to find the model names of the parts. if a main brand name can be found and not a specific model, it could still be good enough to use on a google search.
