For standalone home versions of ESET NOD32 Antivirus that cannot connect to the internet, ESET occasionally provides legacy update packages or alternative direct-download mirror zip archives.
Depending on your product version and license type, you can update offline using the following methods: Mirror Tool (Recommended for Business)
: Downloads the update once to serve dozens of local workstation clients.
Copy the installer from your USB drive into the new folder you just created. Then, run the installer from that folder to perform a new installation or repair the existing one. eset nod32 offline update
On the computer with internet access:
: Secures high-security systems completely isolated from the outside world.
MirrorTool.exe --mirrorForProduct ESET_PRODUCT_NAME --outputDirectory "C:\OfflineUpdates" Use code with caution. For standalone home versions of ESET NOD32 Antivirus
You only need to manually bring new update files via USB to the central internal host. All clients will then update from that host automatically. Security Best Practices for Offline Updates
Before you begin, there are a few key prerequisites and limitations to be aware of:
Setting up offline updates generally follows these non-sequential steps: Then, run the installer from that folder to
The necessity for offline updates arises from a variety of distinct environments. The most obvious are air-gapped systems—computers handling classified government data, industrial control systems (SCADA) for power grids or water treatment plants, or medical devices in a hospital's internal network. These machines are deliberately isolated from the internet to prevent external intrusion. For them, an online update is a breach of protocol. Similarly, users in remote locations with prohibitively slow, expensive, or non-existent internet service—such as researchers in Antarctica or ships at sea—cannot rely on real-time cloud updates. Even home users with metered connections or those reinstalling an old operating system on a machine without network drivers can benefit from this capability.
Offline updates for ESET NOD32 allow you to keep your antivirus protection current on computers that lack a direct internet connection. This feature is primarily available for products and certain legacy versions , as modern home user products typically require an active internet connection for activation and updates. Update Methods