So my windows10 updated last night, I think it was a driver update and not a windows update as such. After restarting my sound was gone. I borrowed USB headphones from someone which works, but the intel hd audio driver isn't working at all. In device manager it's under other devices, and tells me "The drivers for this device are not installed. (Code 28)". I've tried uninstalling it and restarting for windows to reinstall it, but it reappears in the same state. I've tried downloading the installer from both Intel and HP (this is an hp laptop), but in both cases the installer asks me to restart, and after doing so the driver is back in its broken state. Does anyone have advice? I'll probably need to buy some USB headphones of my own as I can't keep these indefinitely, but it would be nice to get the normal sound working again.