users, traditional automatic updates aren't always an option. This guide details the newest methods to keep your virus signature databases current without a direct internet connection.
: For standalone machines, users can download compressed update archives from official ESET portals. These archives are moved via removable media (like a USB drive) to the target machine, where the update path is manually redirected in the Advanced Setup (F5) menu. Recent Developments and Limitations (2026)
MirrorTool.exe --mirrorType regular --intermediateUpdateDirectory "C:\ESET_Temp" --offlineLicenseFilename "license.lf" --outputDirectory "D:\ESET_Offline_Updates" Use code with caution. eset nod32 antivirus offline updates new
As of early 2026, there have been significant shifts in how ESET manages these offline assets.
At the core of this process is the . A mirror is essentially a copy of the update files stored locally on a computer or an internal server. When other computers on the network (or an isolated PC) need to update, they point to this mirror folder rather than the ESET update servers, downloading the virus signature database directly from the local source. users, traditional automatic updates aren't always an option
Connect the storage media containing the offline files to the isolated PC.
To configure offline updates for enterprise client endpoints or isolated business nodes, systems administrators leverage two primary methods. Method 1: Using the ESET Mirror Tool (Recommended) These archives are moved via removable media (like
Run the Mirror Tool alongside your offline license file using the following syntax: