Remove that Driver  From Control Panel > Program and feartures : Uninstall Realtek audio  Install this Driver.  [URL] [URL]  
The Dell repair guy replaced my mother board today because I couldn’t get my speakers to work.  He left as I was signing in to my computer.  He figured out that I had a cord not plugged in correctly.  Nice guy, btw.  Anyway, I still have no sound.  He mentioned that some speakers aren’t compatible with the Inspiron 3880.  Yet when I Google compatibility, I can’t find a list per se.  I currently have Bose Companion 2 Series.   Any advice?
Inspiron 3880: no sound