When should you scan files according to best practices for security?

• A. Only when files seem suspicious
• B. Before downloading any new software
• C. All downloaded files, removable media, and emails
• D. Only on Mondays and Wednesdays

Answer: (C)

Scanning files according to best practices for security is essential for protecting systems from potential threats. The correct choice emphasizes the importance of scanning all downloaded files, removable media, and emails. This comprehensive approach is crucial because it covers a wide range of potential hazards that could compromise a system's integrity.

By scanning all downloaded files, users can identify malicious software that may be bundled with legitimate-looking downloads. Similarly, removable media, such as USB drives, can harbor viruses or malware that could infect a computer once plugged in. Emails are also a significant vector for cybersecurity threats, such as phishing attacks or attachments containing harmful software. Comprehensive scanning helps mitigate these risks by ensuring that any potentially dangerous files are detected and managed before they can do harm.

The other options offer limited protection. For instance, scanning only when files seem suspicious would rely heavily on user judgment, which might not always be accurate. Scanning only before downloading any new software leaves many other potential threats unchecked, such as infected files received as email attachments or malicious content on removable media. Limiting scans to specific days, like Mondays and Wednesdays, is impractical and neglects the need for ongoing vigilance and immediate action when new files or media are introduced. Overall, implementing a thorough scanning process across all potential entry points