Abstract: A computer screen capture method is described that consists of the following steps: capturing screen data at predetermined capture intervals of a selected area including the whole or part of a computer screen. Each successive captured screen data is compared with the immediately preceding captured screen data to determine what area of the screen changes within one or more smaller areas of the selected area. An event list is created having an event interval at least equal to or less than the said predetermined capture interval containing none, one or more entries per interval, wherein the entries maybe one or more of a unique reference to events representing visual change. Previous and successive said smaller areas of the selected area are recreated by playback of the relevant events in the event list.