Lost Mixer As Input Device?

I have a Toshiba Satellite A665-S6086 laptop which had to be re-imaged back to out of the box status. Before the re-imaging, the Realtek audio controller had a mixer panel in its device manager, and on the system volume control, that allowed me to record from the mix of audio going to the speaker (labeled "stereo mix" ). Now, I find that the ONLY recording device that EXISTS is the physical built-in microphone; I just recorded a streamed radio program, and it was basically recording the room noises and, very faintly, the audio from the speaker. That was how I discovered the change in software environment. I have tried downloading the driver from the recovery partition; it installs but does not correct the problem. I have tried uninstalling both audio devices and letting them reinstall on restart. I can play audio to the speakers, but not record the audio internally.