Comodo Antivirus defines malware as "software written specifically to harm and infect the host system. Malware includes viruses along with other types of software such as trojan horses, worms, spyware, and adware."
Viruses are a type of malware, a particularly malicious kind. Like a virus in your body, a computer virus multiplies itself, infects your entire computer and others on your network.
Besides disabling your computer, malware can also steal your personal information or track your online activities. That's why it's so important to run anti-virus software.
