The type of software used to protect computers from malware is known as antivirus software. This program scans, detects, and removes malicious software, providing real-time protection to prevent infections. Antivirus software regularly updates its virus definitions to recognize new threats, safeguarding computer systems from risks such as viruses, worms, and spyware. Comprehensive antivirus solutions also include additional features like firewall protection and phishing detection, enhancing overall cybersecurity for users.