Did you to dell.com, enter in the service tag and install the drivers in the usual order of OS, CHIPSET, MS UAA (see google) and then the audio drivers?

Now Dell might have more utilities but reading your post it looks like you are going elsewhere than Dell.

About those CARDS in a laptop. Sounds very expensive. 99% of the laptops have one board with everything on it. Since we can't use cards like in desktops, making these into cards that only fit that laptop sounds like a great way to inflate the costs.
Bob