When I previously looked at my Dell account, the description for the Conexant Smart Audio Driver only included Windows 8.1, so I assumed it wasn't for Windows 10. I took a closer look and saw it was...

I had a Dell Windows 7 computer and after upgrading to Windows 10, I don't have Stereo Mix under recording devices. Apparently I need a new driver because I have "Show Disabled/Disconnected Devices"...