I've found various suggestions for disabling "electronic" sound when using the mouse (control panel, sounds, Windows Explorer, start navigation, "none"), but I've been unable to locate anything that relates to disabling the "physical" sound (click) when using the mouse. Any suggestions?
Are you joking? The click is the switch operating inside the mouse - there's no way that you can stop that. All I can suggest is that you go to a computer store, try all the mice, and find the quietest one.