To update ESET NOD32 Antivirus in an environment without an internet connection, you must use an Update Mirror
. This process involves downloading the latest detection modules on an internet-connected computer and then transferring them to the offline machine via a local network or removable media (like a USB drive). ESET Knowledgebase Update Methods for Offline Environments
There are three primary ways to manage updates for offline ESET products: Local Update Mirror
: You can configure one internet-connected ESET client to act as a "Mirror". It downloads the full set of updates from ESET’s servers and shares them with other computers on the same local network. ESET HTTP Proxy
: This method is more efficient for larger networks. The proxy downloads updates only when a client requests them, reducing total network traffic by caching common files. Removable Media (USB Drive) eset nod32 offline update full
: For completely isolated machines (air-gapped), you can manually copy update files from a mirrored computer to a USB drive and point the offline NOD32 client to that drive as its update source. ESET Security Forum Step-by-Step Offline Update Setup
To successfully update an offline computer, follow these standard procedures: Configure the Mirror (on an internet-connected PC) Open your ESET product and press Advanced Setup Navigate to Create update mirror and specify the Storage folder where the files will be saved. Point the Offline Client to the Mirror On the offline machine, open ESET and press , find the Update server Enter the full path to your mirror folder (e.g., \\ServerName\MirrorFolder or a local path like E:\ESET_Updates if using a USB drive). Run the Update tab in the main menu and click Check for updates
. The software will now pull the latest modules from your local source instead of the internet. ESET Knowledgebase Important Considerations Offline Installer
: If you are installing the product for the first time without internet, you must download the specific ESET Offline Installer To update ESET NOD32 Antivirus in an environment
(available in 32-bit, 64-bit, or ARM versions) from the official ESET Support Portal Activation
: Even if updating offline, the product must be activated. For environments with no internet, you may need an Offline License File (.lf)
, which can be generated through the ESET Business Account or ESET HOME portals depending on your subscription type. Troubleshooting : If updates fail, ensure your Proxy mode
is set to "Do not use proxy server" in the Advanced Setup under Connection options Method 1: The Official Mirror Tool (Best for
to prevent the client from trying to reach ESET's external servers. ESET Security Forum
This is the safest method to create your own offline update package. You need one computer with internet access (the "Source") to download the files, and a USB drive to transfer them to the offline computer (the "Target").
Instead of fetching updates directly from ESET’s servers, the offline method uses a mirror folder—a local repository of virus signature databases (.dat, .nup, .ver files). A computer with internet access downloads the updates once, then you transfer them via USB or network share to the offline machine.
An offline update allows you to update virus signature databases without an internet connection on the target computer. You use a second, internet-connected computer to download the update files, transfer them via USB drive, and then manually apply them to the offline machine.