my volume wont work whatever i do i tryed youtube all that stuff it just said that my volume icon expired. so now that little volume think at the bottom doesnt even show up. its not on mute. i even went to the control pannel and clicked adjust volume but it said there is no device go to harware and printers and something like install a new device it said that but when i tried it didnt have anything to install and my computer didnt come with a disk.please help me i cant even listen to my music itunes wont even work not even cds and i dont think its my speakers<br />