[any ANONYMOUS forum user]

After a long search I ended up here, I am running Windows Vista with Soundmax Integrated Digital HD Audio, driver version 6.10.1.6030. I downloaded the driver again from my laptop manufacturer and changed every "Disable Stereo Mixer" value of "01" to "00" (around 6 of them in the "ADIHdAud.inf" file. Deinstalled the drivers then rebooted, quickly installed the driver and stopped the windows automatically driver install (quickly accessing task management ctrl+alt+del and ending the process) then ran the setup. I now can use the feature "stereo mix" by unhiding it and activating it in configuration/sound/record devices.

Thank you for finding this out!