Renew or re-enter a valid license key via the tab. 2. Clear the Update Cache Corrupted temporary files can stall the update process. Press F5 to open Advanced Setup. Navigate to Update . Expand the Basic section. Click Clear next to Clear update cache . Restart the computer and attempt the update again. 3. Check Network and Proxy Settings

If you cannot afford a premium license, it is significantly safer to use a dedicated free antivirus solution (such as Windows Defender, Avast Free, or Bitdefender Antivirus Free) that receives legitimate, official, and automated updates directly from its respective cloud infrastructure.

If you are running an unlicensed or trial version of ESET NOD32, follow these exact steps to apply the free fixed server list.

Use official ESET trials to keep definitions current while evaluating the software.

This often indicates a false-positive or update failure. Solutions include:

| Server Type | URL | |-------------|-----| | | http://update.eset.com | | US / Global (HTTP) | http://um01.eset.com/nod_upd/ | | US / Global (HTTPS) | https://um01.eset.com/nod_upd/ | | Europe (EU) | http://eu01.eset.com/nod_upd/ | | Backup / Legacy | http://update.eset.com/eset_upd/ |