The tooltips which pop up over the taskbar, tray, and on the quick launch toolbar seem impossible to remove with any registry setting. Does anyone know a way? This is not refering to explorer tooltips or those on the desktop which are removed through either tweakui, folder options, or registry changing. I am able to change their appearance, ie colour and text size but have no idea where they are located in the registry.

there coded into windows and any applications installed.

As far as I know there's no way to remove them because they're not linked to the registry just the application code.