To force disable alerts, sticky keys, go to "start," "control Panel". Select small or large icons (not category) and find the icon of "ease of access Center". You will see a list of simplifications to operate the computer. Of the proposed devices select "Relief work with the keyboard".
In the window that appears, find the section "to Simplify typing" and UN-check all options, including the option "Enable sticky keys". If sticky keys you need to keep active, but you only need to turn off distracting audio signal produced by the computer, tick the option "Enable sticky keys" and click on the blue link "setup sticky keys". In the window that appears, untick the bottom tick the option "beep when pressing the CTRL, ALT and SHIFT", and then click OK, OK again and close control panel. So you turn off sticky keys, or will remove annoying sound.