Brett bought a Windows 10 computer from Dell and the audio presets are missing. Leo says that sounds like a driver issue based on an incomplete recovery. Brett should go to the Dell website and get the updated Windows 10 drivers. He could also try deleting the sound drivers, reboot and then let Windows reinstall them. It could be that the DVD installed the wrong driver.
Brett should get all the latest drivers for the computer from Dell's website and install them. That should fix the issue. He shouldn't just rely on the DVD they gave him, since that's only as current as the moment they created that DVD.