In today’s world of connectivity, computer viruses and worms pose a serious problem to America’s communication and business infrastructure. The purpose of this project is to use historical data of virus and worm attacks to create a model that will accurately simulate the activates of both viruses and worms within a given computer network. Using this model we will predict vulnerabilities within a dynamic system and find solutions to alleviate these problems. The model created during this project will have applications beyond our use: examples are a “Red” testing tool for system administrators that could help them predict holes in security caused by user lever changes, and a program that could use information of a network to warn a user of their personal security risks. The project’s importance is not only security of private systems but the security of systems around the world.