For most people, following the basic rules of Internet security, using unique and secure passwords, keeping the system up-to-date, using a firewall, avoiding clicking on things you are not sure of, will be a reasonable defense against hackers. and the malware. But sometimes preventive medicine is not good enough and you need more specialized tools to treat your infection.
Maintaining the network is a fundamental part of progress as a hacker. Intrusions can come at any time, and in many ways, making the defense against you a constant challenge.