What defines malware in the context of computer security?

Malware is specifically defined as software that is intentionally designed to infiltrate or harm a computer system or network without the owner's informed consent. This includes a wide variety of malicious software types, such as viruses, worms, Trojans, ransomware, and spyware, all of which can disrupt system operations, steal sensitive information, or cause damage. The intent behind malware is always to cause some form of harm or unauthorized access, which is succinctly captured in the chosen option.

The other options describe software that serves legitimate and positive functions. Software designed for user convenience enhances user experience and productivity rather than damaging data or systems. Software that helps in data encryption is utilized for securing information, protecting against unauthorized access instead of compromising it. Lastly, software that facilitates system updates is aimed at improving system performance and security rather than infiltrating or harming it. Thus, these options do not align with the core definition and purpose of malware.