Realtek audio driver and MaxxAudio after Windows 10 upgrade

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.