A computer system that automatically and securely executes registered programs immediately prior to a transition to a reduced energy consumption state. A registrar table specifying registered programs and a secure modification detection value for each registered program are maintained in system...http://www.google.com.au/patents/US5850559?utm_source=gb-gplus-sharePatent US5850559 - Method and apparatus for secure execution of software prior to a computer system being powered down or entering a low energy consumption mode 
