Audio not working

Hello,

no device found on my toshiba vista window

hello....i've tried all the suggestions, but the problem is I can't locate rather there is no such thing as SOUND AND GAME CONTROLLER FOUND in my device manager..what do I do?? been using my laptop with no sound for a month..and its killing me....please...need help.....thanks.... those who are willing to help..you can add me on my facebook account and please PM me for your assistance..it will be a big help...thanks a lot in advance.. here is my FB account <<address removed >>