http://en.community.dell.com/support-forums/desktop/f/3513/p/18266104/18389090.aspx#18389090

go to control panel , select sound and audio devices, select voice , in the voice recoding box open it and select the mic that came with your head phones then click ok ,apply .. remember what u changed in case u want to change it back.. this should make the mic work
___________

As for drivers, on the link above the person said that no drivers came with those headphones. If they did, you would have gotten a CD to load them on your computer. They are files that a computer might need to work with different devices that plug in to it.

View the original article here