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For everyday home users, ESET strictly requires an active internet connection for both product activation and regular module updates. The official stance from ESET Support eset nod32 antivirus offline updates verified
The files are transferred via secure media (like an encrypted USB or a local LAN) to the offline machine, where NOD32 is configured to pull updates from a "Local Folder" rather than ESET’s web servers. Conclusion Download the from the ESET Business Download Page