1. A method for processing and presenting multimedia diagnostic information as a diagnostic tree structure including branches having a plurality of nodes and node-connecting links in a computer system, the method comprising the steps of: displaying multimedia diagnostic commands representative of various types of multimedia diagnostic information; conveying multimedia diagnostic information to a user of the system; storing a multiplicity of diagnostic information records mapped into the diagnostic tree structure, the diagnostic information records including: information records denoting the text strings to be displayed; information records denoting the multimedia commands to be displayed; and information records denoting the multimedia diagnostic information to be presented; receiving an initial command; displaying a graphical representation of a plurality of nodes including a question and answer node of the diagnostic tree structure including at least one text string in response to the initial command; displaying a plurality of multimedia diagnostic commands corresponding to the question and answer node; receiving a user command related to one of the displayed multimedia diagnostic commands; and presenting a selected amount of the multimedia diagnostic information to the user of the system in response to the user command.