Computer Applications

Viruses

In Class 9 Computer Applications, students learn how computer viruses are malicious programs that can attach to files, spread between devices, damage or alter data, slow systems, and compromise privacy. As part of Cyber Safety, the topic explains common ways viruses enter a computer, such as unsafe downloads, infected attachments, and removable drives. Students also learn practical prevention, including using updated security software, checking files before opening them, avoiding suspicious links, maintaining backups, and following safe digital habits.