If you manage 5+ offline computers, downloading the update for each machine individually is tedious. Instead, create a local mirror server.

| Error message | Likely cause | Solution | |---------------|---------------|----------| | “Update files are corrupted” | Incomplete download or extraction | Re‑download the offline package; verify checksum (SHA1). | | “No update server found” | Wrong folder path | Use full absolute path, no spaces; check permissions. | | “Signature version is older than current” | Downloaded older package | Always download fresh offline package on the same day you apply it. | | “Modules mismatch” | Different product version | Use the exact offline package for your ESET version (e.g., Endpoint 10.x ≠ Home 17.x). |

If the offline computer is already infected and you cannot boot Windows, use – a bootable Linux live USB with ESET scanner. It works completely offline using an internal signature database (you must build the USB on an online computer first).