If you click your start menu, then right click 'my computer' then properties on the menu. then at the top of the screen that comes up click 'hardware'. then below that click 'device manager'. This will open a list of the hardware your computer has. There should be a listing "Network adapters". If you click the little plus sign next to it, it will tell you what network card you have in your PC. If you dont see 'network adapters' then you either dont have one or its not installed correctly.