A virus program usually hidden in... 

The correct answer is The operating system or application program.

Key Points

• Viruses are malicious software programs that can be hidden in both the operating system and application programs.
• They can infect system files, applications, and other important software, leading to data corruption or system malfunction.
• It is essential to have updated antivirus software and security measures in place to detect and prevent virus infections.
• Regular system scans and avoiding suspicious downloads can help in minimizing the risk of virus infections.

Additional Information

• Malware: Malware is a broader term that includes viruses, worms, trojans, and other harmful software designed to damage or exploit systems.
• Firewall: A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules, offering protection against unauthorized access.
• Backup: Regular data backups are essential to prevent data loss in the event of a virus infection or system failure.