ugh. my laptop speakers worked perfectly yesterday. today, total silence. the voulme slider moves, the little meter in Sound settings doesnt bounce at all, and nothing plays. the only change i can find is a MB48/N Audio Driver update from Shuttle.

USB Audio Device Properties
Device status:
This device cannot start. (Code 10)
{Operation Failed}
The requested operation was unsuccessful.
i tried plugging in a different pair of headphones in case teh laptop speakers died, but same result. YouTube plays silently, games are silent, notifications are silent. It feels like teh PC forgot it has a sound card. Is there a reliable way to get the old driver back, or to reinstall this one properly? thx in advance!!
printer saw i was in a hurry and chose violence