Colette,
You didn't tell us the OS, so I'm assuming you have Windows XP. The easiest way to find your driver is to go to the Control Panel and click on Sounds or Multimedia (depending on OS version). You should find the sound card driver there. If you have an Internet connection, you might try clicking Update Driver -- and allowing the system to try and find a newer driver. Hope you get it worked out!
CharlieJ, April 2007