Interesting - thanks for the feedback.
As for the DWORD what did you change it from and to?
I am starting to think that the notification is tied to something else....
Do you hear a beep when the notification appears?
On my system, toggling "CAPS Lock" results in a beep and the letters "AA Caps lock on" appear.
Then, when toggled again, I once more hear a beep along with the letters "AA Caps lock off" appears. (Actually the strikeout line is diagonal and not horizontal.)
That happens with respect to Caps Lock, Scroll Lock, and Num Lock - the difference being the worded part and icons presented being different in each case.
But, thus far, always a beep.
I have been using Powershell search the registry keys for "caps lock" and variations thereof. I think I found where the "beep" can be disabled but not at all certain about the Value to do that.
Just realized that maybe I should search the registry for "Scroll".