This document discusses computer ethics and malware. It outlines 10 computer ethics rules including not using computers to harm others or steal. It defines malware as malicious software designed to damage systems. Several types of malware are described like viruses, ransomware, spyware and Trojan horses. Statistics on malware infection rates and top developing countries are provided. Symptoms of malware and prevention/removal methods like using anti-malware software and updating systems are outlined.