Go to device manager and the sound card will have a question mark on it, right click, click properties and find the exact model of it..

You can either search on google for it or post it here and i'll get you a link...

The pc has a speaker inside? You don't mean the beeper do ya? Every PC has a beeper, either as a speaker or a tiny one soldered onto the mainboard.. That's to sound bios errors, as a kind of Morse code. You won't hear anything esle out of it...

I've never heard of a pc having a speaker for actually listening to stuff from before... It'd have to have an amplifier built in too.. which seems unlikely....

Either way, check that model number! The driver shouldn't be too hard to find, unless it's really old and obscure...  :-/

You want the name of the device, not the name of the driver... If it's not working, it must need the driver installing, or the correct one installing. Find the device name, not driver name.

Check your error log to see what the cause of the error was.