Do you have the drivers and they won't install, or do you not have the drivers? Did they come with the computer, on a CD?
The driver depends on the device and the model of your computer or motherboard. You could provide this information to us, or you could go to the computer manufacturer's site, find the Support section, enter your model, select Download, look for Drivers, and there they will be.
There is always this excellent but very technical suggestion from Saga Lout: http://www.tomshardware.com/forum/