The purpose of anti-virus software is to detect, prevent, and remove malware from computers and networks. This software scans files and applications for known malicious signatures, blocking or quarantining threats before they can cause harm. In addition to traditional viruses, anti-virus programs now protect against various forms of malware, including spyware, trojans, and worms. Regular updates are crucial for maintaining effectiveness, as new threats continually emerge. By safeguarding systems against malware infections, anti-virus software plays a critical role in maintaining the overall health and security of devices and networks.