if it is installed into the motherboard, go to your computer manufacturing website, and download and install the driver, if the card is not installed on the computer (it will be about 5-7 inches below the mouse, keyboard, parallel, and maybe USB and video ports) if that is the case you have to get the product number and manufacture and get the drivers from them
if you just bought your computer from like HP, they may have given you a driver CD, you can install all those drivers, i know the two HP's i bought came with them
good luck