If you hear a "klak klak" kind of ear-piercing noise when winding the window, don't panic because this is not the car window malfunction but a normal phenomenon. Window produce noise when moving up and down is usually cause by the sand or dust trapped between the window glass and the weather strpe. When the window moving up or down, the glass screeching by the dust/sand and produce such noise. Owner can use a brush to clean the dust or sand from the weather stripe and channel guide. If the cleaning is not perform for a long period of time, it will cause scratches to car window glass when using it.
Owner can clean the dust in weather stripe or channel guide, such rattle noise dose not consider as car malfuntion. If the noise still exists after cleaning, suggest to diagnose at workshop.