First, I am talking about the speaker that beeps after POST on startup, not the speakers and associated components that play Beethoven.
History: I had this same problem when I first got this computer, an Acer Aspire 1640z (may it burn in everlasting hellfire.) ToggleKeys would not work, no matter what I did. I really depend on this for CapsLock as it's easier to remember which beep I heard last than whether I've hit it an even or odd number of times. And then one day many months later it just started working. It was after I had connected to the internet and enabled auto updates so I thought maybe somehow that had fixed it.
Now, after my recent go round with installing/uninstalling Service Pack 3, it has stopped working again. However, it is not ToggleKeys, because when I turn on SoundSentry the Title bar blinks. So I have narrowed down the problem to the System Speaker, which seems to have disappeared.
I found a list of all the registry settings for this beast and what they are supposed to be, and all mine are set as advertised.
On another site a fellow said to go to device manager and find System Speaker under System Devices and...I have no System Speaker under System Devices!
If anyone has any ideas, I would be grateful.