Security Updates fix vulnerabilities in operating systems. Be sure to configure your computer to automatically update on a regular basis (ResNet suggests checking for updates weekly).
Most modern operating systems include a built-in firewall. In order to work properly on ResNet, the firewall on your computer must be set to medium or low strength.
Passwords are the most important links in the chain of computer defense. Unfortunately, the importance of a strong password is often underestimated by users. The job of keeping data safe does not end with creating a strong password.