An advanced electronic alert system for monitoring computer network(s), environment, security and the status of tasks being processed by a computer. The system stores voice recorded and text alert messages on computer readable magnetic media; automatically dials designated persons when alert situation(s) are detected; and then replays the applicable recorded voice alert message(s) once an alert call has been completed. Alternatively, alert messages may be transmitted by the system using phone dialing tones, in those cases where an alert call is placed to a digital device, such as a pager. The system issues automatic alert warnings to one or more designated persons when main electrical power fails or is restored; the temperature becomes too hot or too cold; a loud sound is detected, such as that produced by a smoke detector, fire alarm, etc.; a central network computer/file server fails; an intruder and/or water has been detected; main and/or backup power fails; a computer software program fails and/or is successfully completed; or a microprocessor based computer used as part of the system fails.