when I click on the link that I posted I get a page with several other links, when I click on the HDaudio link I get a page with a warning that their drivers may not have customizations for specific manufactures features, there is an accept these terms check box and next button. Same with the AC97 link. If the ATI graphics card is an ad-on and has the drivers loaded for it, and there is a built in graphcis card, intel chipset based, the video controller exception may be for the onboard intel graphics, the onboard graphics should be disabled in the bios setup, then the "video controller (vga compatible) device can be uninstalled from the device manager. Not sure what drivers you need for the base system device. Looks like you need some drivers from dell. Other than getting the dell drivers, have you checked the volume control properties, double click the speaker tray icon and look for any "muted" playback sliders? Try entering the service tag into the service tag link that reads "Add or Edit Service Tag"
via support.dell.com also look at their driver install order to see what drivers should be installed first. http://support.dell.com/support/down...&catid=&impid=