ok weird one did a BIOS update on my convertible latpop and now theres no sound at all. the speaker icon has a red X and says this:

USB Audio Device Properties
Device status:
This device cannot start. (Code 10)
{Operation Failed}
The requested operation was unsuccessful.
no audio output device is installed, device Manager shows a couple of unknown devices under Other devices... which driver should i be looking for? everything else works fine: Wi-Fi, touchpad, display, its just the sound... im guessing a single missing driver, but i dont know which one or where to get it. seriously need help here 馃槶