Need audio driver for pc?

hi iamreposting this cauz none of the answers was helpfull,i need audio drivre for my pc it says i need multimedia audicontroller but cant get it,,tried realtek ac'9 it restarts my pc at the end of instalation....and please if you gona give me a site where to download something that scans my pc i wont even pay 1 cent...(dont advertise your pay to download sites here )