Antivirus software collects various types of data to protect systems, including system details (operating system version, RAM, CPU type, computer name), network data (local and external IP addresses, DNS server, network name), user data (Windows username, time zone, language, general location), browsing history (if web protection features are enabled), and file-related information (file names, locations, hashes, and sometimes entire files).
The AV-Comparatives report indicates that while some antivirus companies manage data responsibly (e.g., F-Secure, G Data, K7), others (e.g., Norton, Panda, McAfee) have been criticized for poor practices. Data sharing can enhance malware detection but poses privacy risks, as seen in AVG's past actions of selling user browsing history. Users can limit data collection by adjusting settings, reviewing installation agreements, avoiding free antivirus software, choosing privacy-conscious vendors (like F-Secure, ESET, G Data), and reading privacy policies. Despite concerns about data collection, antivirus software is essential for protection against cyber threats, and selecting a transparent provider can help safeguard privacy.