Malware refers to any program installed on a computer that performs harmful actions. Malware may steal personal information, encrypt files for ransom, or perform any number of other criminal acts. Common types of malware include viruses, Trojans, worms, rootkits, and ransomware. Both commercial and free software is available to remove malware from an infected machine. However, the best protection from malware is safe browsing habits.

Salem Press Encyclopedia, 2022. 3p.