A network device includes an electronic program guide (EPG) component configured to receive EPG data associated with an EPG from an external EPG server. The network device further includes a manager component comprising a pre-loader configured to pre-render and send first EPG images, associated with the EPG, that are frequently re-used to multiple client devices; a graphics interceptor configured to generate one or more second EPG images based on a graphics call, wherein the graphics call causes a first one of multiple client devices to display the one or more second EPG images; and a window manager configured to track changes in the one or more second EPG images and send a modified EPG image that includes the changes, or a modified portion of an EPG image that includes the changes, to the first one of the multiple client devices.