Copy the entire output folder ( ESET_Offline_Updates ) onto your USB drive.
Before attempting to configure offline updates, it is important to understand ESET's licensing and structural requirements.
If your offline machine has Wi-Fi, simply tether to a mobile phone for 5 minutes once a month. Let ESET update normally, then disconnect. This is often easier than managing ZIP files.
On the offline machine, open ESET and press for Advanced Setup . Go to Update → Profiles → Updates . eset nod32 antivirus offline updates
You will need a separate computer with internet access to download the update files or use the Mirror Tool.
Maintaining a high level of cybersecurity on computers without internet access is a critical task, especially for air-gapped systems or machines in remote locations. For users of ESET NOD32 Antivirus, performing offline updates ensures that the detection engine remains capable of identifying the latest threats without needing a direct connection to ESET's servers.
In the main ESET interface, click on the tab in the left sidebar. Click the Check for update button. Copy the entire output folder ( ESET_Offline_Updates )
With (often called “update packages” or “.zip updates”), you can: ✅ Update air-gapped or isolated systems ✅ Save bandwidth on limited connections ✅ Manually control when updates apply
Transfer these files to your offline network using a secure USB drive or local web server. Step 2: Configure the Local Update Server
How to Manually Update ESET NOD32 Antivirus Without an Internet Connection Let ESET update normally, then disconnect
Connect a formatted, scanned USB flash drive to the internet-connected PC.
If your internet is slow but exists, consider ESET’s lighter cloud-based scanning. However, note that real-time cloud features require constant connectivity—so offline updates remain superior for truly disconnected machines.
But what happens when your secure system is an "air-gapped" computer—one that is deliberately disconnected from the internet for security reasons? Or what if you are repairing a machine with a broken network connection?
This tool is designed for the specific scenario of updating ESET products on a disconnected network. It can accurately grab the correct virus definition files for a specific ESET version and generate the necessary file directory structure that ESET expects. It can also assist in deploying the downloaded database to the correct location on the target ESET installation. Some versions of this tool can even set up a lightweight HTTP server to act as a local update source for other computers on the network.