Some people object and jokingly call this a ploy by Bill Gates to force you to ask for permission before leaving his program. It contains a lot of information about your hardware and software. In case of a computer crash, Windows reinitializes the computer with the previous successful version of that file. My NEC monitor has a clever protective screen cover called a Monitor Lens. It slides in standard tracks on both sides of the monitor, and uses a non-reflective, electrically conductive glass.
Grounding occurs in the tracks.
As a result, there is never any dust buildup on the tube. And unless you know about it, you cannot even see it. For efficient mouse use, it is advisable to use a mouse pad which tends to keep the ball clean. The pad has a roughened surface so that the action of the cursor on the screen as a result of mouse movement is smooth and skip-free. The few minutes occasionally needed to clean the mouse is well worth the effort.