All of a sudden my computer lost its sound. when i clicked on audio devices in control panel it tells me i have no audio device. when i access device manager it is empty. so i bought a new sound card upon the advice of my local computer store. installed it and still nothing. still nothing in device manager and still no sound.i have tried to change my audio settings in bios but cannot acces BIos. when i get into the settings menu upon loading window there is no bios. only cmos and a few other things but nowhere to disable audio. Can anyone help?? Cheers