Train employees in security principles Protect information, computers and networks from viruses, spyware and other malicious code Provide firewall security for your entire IT infrastructure Download and install software updates for your operating systems and applications as they become available Make backup copies of important business data and information Control physical access to your computers and network components Secure your Wi-Fi networks. If you have a Wi-Fi network for your workplace make sure it is secure and hidden Change default credentials for all systems and require individual user accounts for all employees Limit employee access to data.