audio - How to make Windows 7's volume mixer save individual volumes again?

Possible Duplicate:
Where are the Vista/Win7 Volume Mixer settings stored?

Windows 7's volume mixer is normally saving the volume levels for individual programs, as long as the exe file doesn't change.

However, for some reason, this functionality stopped working on my computer. Every program is opened at full volume, which is quite unpleasant with my current speaker configuration. If I set this volume and close the program, the next time I open it (no matter of reboot), it will be again at full volume, not remembering my setting.

Is there a setting or a registry key to adjust, to make this functionality work again? Or is the problem related to the place where these settings are saved (wherever that might be)?

(There are other questions around this topic on SU, but none is really about this particular problem, nor seems to give a hint about the issue)

Answer

You need a backup to try this really.
Delete this whole PropertyStore key, and everything under it, out of the registry.

HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\LowRegistry\Audio\PolicyConfig\PropertyStore  

It would be good to export that section for backup first, or have a whole image backup of the system, because . . . well it doesn't make sense that it is under internet explorer?

It doesn't make any sense to me, but it holds that information, and I tested it. I tested it after confirming that the data is cleanable. On 2 forums they are indicating that this data would be good in a cleanup utility. I tested by tossing out the whole of mine, and re-booting. I tested by making adjustments and refreshing the registry to observe the change in data there from the mixer adjustments. Of course if you're using such a cleanup utility at boot, then maybe it was included in it?

This would only be a start at trying to find out why the info isn't being used.

Then provide more information. Does it work when on the same boot? Or does it occur after a re-boot? If you just closed the program that was set, then re-open it as the next step a few second later, does it work then? Did you or do you use a Registry cleaner? What is the program ID each time? There is some discussion about it using the PID for the program?