There was an installed driver (courtesy of Microsoft), a generic HD Audio that probably came from Analog Devices, themselves. When I upgraded from Windows 7, one of the first things I noticed (once I realized it had booted up and I was staring at the desktop and not a splash screen) was that the sound wasn't working.
I thought I'd create an account so that I could share / brag about making the internal speaker on the OptiPlex 760 (and presumably others) work with Windows 10 and likely Windows 8, as well.
