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sorry this is a little off-topic, but JOcean, your sig says you work with an Inspiron 15 5575, which is what I'm trying to fix. Can you please tell me which audio driver you're using?
I've tried everything I can think of but I can't get it to work. I have uninstalled and reinstalled my Realtek Drivers multiple times, even trying older versions... In the Device Manager it never shows up as "Realtek High Definition Audio", it only shows up as "Realtek Audio". I can access Waves MaxxAudio Pro however, Realtek HD Audio Manager does not open. I can access the file location and open the application but nothing shows up. It says it's running in the expanded Task Manager however I cannot access it. Is this just something to do with the Dell Inspiron 7567? I've had this problem two other times in the past but I can't remember how I fixed it. Any help would be greatly appreciated.
Have you tried both the Dell drivers here, and the Realtek drivers here. The drivers are quirky to install deepening on the version. You may find that you have to restart the system a number of times when prompted to do so before the drivers are installed.
though the Realtek HD Audio drivers available from Realtek's web site have not been updated since late July 2017 (latest available from the Realtek site is R2.82 released 7/26/2017) and Dell has already gotten much newer audio driver versions for some of their laptops