Three major concerns of computer system and network builders and users are dis- aster, security, and human error. Natural disaster, such as flood, may severely pose great threat to the infrastructure. Cyber security has never been so challenging, even now with most expensive protection programme, any reputable consultant won't guarantee it from any breach. The last but not least, human errors from the internal computer network users also may create major headaches for a chief information officer. Propose ONE (1) course of action to at least mitigate each listed threat below from happening, towards more sustainable computer security and system operation; ii) Internal sabotage