If uninstall my Dell insiron 1520 webcam software where can i find the software to reinstal it?

My Dell inspiron 1520's sound is not working and maybe if i reinstall it will maybe come on.but where can i find the software to reinstall it?If uninstall my Dell insiron 1520 webcam software where can i find the software to reinstal it?Gee thats a tuff one! Oh! Hey! How about the Dell website?If uninstall my Dell insiron 1520 webcam software where can i find the software to reinstal it?either from the Dell site or just do a search online.