Open ESET NOD32. Click Help and support -> About. Look at "Virus signature database version." Compare the date to the date on the ESET website.
Do NOT use “update downloader” tools from YouTube or torrent sites. Many claim to offer “ESET NOD32 update file download direct for free lifetime.” These often: eset nod32 update file download direct
ESET’s official policy: Offline update files are freely downloadable only for valid license holders. However, ESET does not restrict the HTTP directory for evaluation cache files. Still, to remain compliant, ensure every computer receiving the offline update has a purchased license. Open ESET NOD32
Yes. The direct file is only ~100 MB, which is perfect for metered mobile connections. Download it on your phone, transfer via USB cable to your PC. Click OK
After downloading the .ndf and .ver files, verify their integrity using the Digital Signature property (Right-click → Properties → Digital Signatures tab). Valid files will show "ESET, spol. s r.o." as the signer. If the signature is missing or invalid, do not use the file.
Once downloaded, the update is applied via the ESET GUI:
For silent deployment (command line):
"C:\Program Files\ESET\ESET NOD32 Antivirus\ecls.exe" --update-offline="C:\offline_update"