Are these built-in speakers, or stand-alone speakers? If they are stand-alone, did they come with a CD / installation disc? Have you checked out the manufacturer website of the speakers for a driver download?
If they are built-in speakers, you can try to update the driver by going into your Device Manager.
Speakers don't require drivers.
Sound cards require drivers, these can be from the maker of the card or for onboard sound from the motherboard maker or chipset maker.
Make and model number would be required to find the drivers.