An e-epidemic model of malicious codes in the computer network through vertical transmission is
formulated. We have observed that if the basic reproduction number is less than unity, the infected
proportion of computer nodes disappear and malicious codes die out and also the malicious codes-free
equilibrium is globally asymptotically stable which leads to its eradication. Effect of anti-virus software
on the removal of the malicious codes from the computer network is critically analyzed. Analysis and
simulation results show some managerial insights that are helpful for the practice of anti-virus in
information sharing networks.