Thanks for the response. I'm far from a computer expert - so I hope this isn't a dumb question.
How can I determine what the correct driver settings should be? Or whether I need to install new drivers? If I do need to install different drivers, how do I know which drivers to install?
Check it out on the realtek website and you will get the right kind of drivers
In the driver settings you may have to configure the 5.1 settings in order to get the sound