Run the Mirror Tool via Command Prompt to download the latest signatures. A typical command looks like this: MirrorTool.exe --repositoryPath "C:\ESET_Updates" --offlineLicenseFilename "license.lf"
Update your offline signatures at least once a week. In high-threat environments, daily updates are preferred.
Standard antivirus software relies on a "pull" method, where the app checks for updates every hour. For machines without internet access, this is impossible. Offline updates are essential for:
Always scan your "transfer" USB drive on a clean, online machine before plugging it into your offline system.