Logitec Keyboard

The scroll bar makes a clicking noise during use. To turn the noise off/on, hold the 'FN' key and hit the 'pics' button next to it.
To turn the bar off altogether, since it is very sensitive, hold the 'FN' key and hit the 'X' next to it. To turn it back on, hold the 'FN' key and hit the flip-3d key next to it.