NEEDS SOUNDCARD DOWNLOAD

though i need to know the os u r using..
considering that u r using win xp or vista..
howevr, u may try searching the internet for ur audio/snd driver by locating itz make n no (eg CMI***/ADI***/ALC***/RTL*** so on, where * indicates model no.), itz a .5 sq in. to 1 sq in, in dimension, situated in a place nr the pci(s)[see infront of the slot] n the back-panel audio port(s)..

along wid the company, there will b a list of such site n driver download links if u search by the model name on a search engine like google..
download them onto a location; if the driver is in a zip format, unzip it,if itz in .exe form, just run it; if done manually it'll ask for the correct driver and location; relocate the path and a.inf file (wat it'll ask for)..
try downloading..

http://drivers.softpedia.com/get/SOUND-CARD/OTHER-SOUNDCARDS/ECS-G31T-M-V10-Audio-Driver-192.shtml

but always better to consult ur system admin/vendor....