I have 4 Dell PCs in my home network, an XPS8500, an XPS8700, an Inspiron 3647 Small Desktop, and an Inspiron 17 laptop. All were running Windows 8.1 (64) and were upgraded to Windows 10 (64). After the upgrade I started having audio problems with the XPS8700 and the Inspiron 3647. The included the audio increasing in level every time I started an application that used audio (Hulu, Netflix) or a flash video on youtube until I turned it back down and all the Maxxaudio settings were missing in the Dell sound manager (or the Sound Manager wouldn't even load on reboot.
I tried manually uninstalling the Realtek audio driver from Device Manager and reinstalling but that had no effect. After communicating with Tech support I downloaded the most current audio driver package for Windows 10 from the Dell support page for each PC and ran the appropriate one on each system. The package completely uninstalls the driver and reinstalls it and the Maxxaudio software.
Now audio is working correctly on both systems and all the Maxxaudio functionality has returned, except EQ presets can only be accessed from the Speakers/Headphones control panel in the Windows' Sound Control Panel (which appears to be some kind of Windows 10 glitch (or "feature"), which hopefully Dell or Microsoft will be fixing in a future audio driver update.
For the XPS 8700 you installed?
Version: 22.214.171.12425, A00
For the Inspiron 3647 you installed?
Version: 126.96.36.19909, A00
I am not sure which specific Inspiron 17 you have but the XPS 8500 never sold with Windows 10. So what audio driver is installed in it?
As I mentioned, the Inspiron 17 and the XPS8500 both worked fine after upgrading them to Windows 10, but since you asked the XPS8500 I would have to assume is still running on the Windows 8.1 Audiomaxx install, I updated the Realtek driver on that PC via Microsoft.
SoundMax is the Analog Devices AD198X codec which is not the same as the realtek codec. Audio ESP does not work without the OEM Vista or Win7 driver. The generic driver from microsoft does not detect internal speakers or headphones etc. AudioMaxx plugin is not a dell software product.
The XPS8500 is not supported under Windows 10, and my audio went south going to Windows 10. Since I love music with great audio, I kept searching and searching, and finally said what the heck the XPS8700 is supported so I downloaded that driver. SWEET!!
I am only missing presets so I am making my own.. what the hey...
So I updated my other XPS 8500 with no issues using Dell XPS 8700 Realtek ALC3861 Audio Driver Version: 188.8.131.5225 ,A00.
I have also added 13 new presets and my audio on my XPS 8500s is back to awesome. I have been using a pair of Koss Pro/4x Plus headphones since 1989 and they are back to amazing.
My presets are attached, converted from Windows 10 media player MusicBee Version 3.0.5995. I recommend this player. You will have to round the values in the sheet since I listed the actual converted frequency values for accuracy.
So here I am now sitting in my home office filled with Dell equipment, and listening to great audio again while I try to work :-)