Anti-Virus Software Prevents Boiler Safety Shutdown

Event Year: 2001 Reliability: Likely But Unconfirmed
Country: United States
Industry Type: Petroleum

A TUV approved boiler safety protection system used Microsoft Excel on a PC workstation for programming. This workstation also had Norton anti-virus software running. The AV software prevented the proper communications between the PC and the protection system.


The protection system was incorrectly configured and a safety shutdown that should have occured did not.