The Graphics Device Interface (GDI) subsystem on the computer is responsible for rendering information on the screen. GDI accepts requests for the display of information from several applications or services. When you scroll through a Web page by using a mouse, a keyboard or a touchpad, and the Use smooth scrolling option is enabled, requests are made to redraw with every line that changes. This behavior may cause high CPU use. Therefore, if you use a mouse, a keyboard, or a touchpad to scroll through a Web page while you play a video DVD, an audio DVD, or an audio CD, you may experience video or audio distortion.