At the time of writing (late 2024/early 2025), ESET has fully migrated to a "License Key" system (XXXX-XXXX-XXXX-XXXX). The old v5 servers are deprecated. However, here is why the free lists you find on torrent sites or blog comment sections fail:
You might have found an old CD-ROM or an offline installer for v5. You might think, "Old computer, old antivirus is fine." It is not.
To help you understand what you are seeing in those old text files, here is the breakdown of a legitimate v5 credential: Eset Smart Security 5 Username And Password Nod32 Keys
Example (Historical/Invalid now):
Username: EAV-12345678
Password: abcde12345
Expires: 2015-06-01
If you try to enter this today, ESET will return: "The license is not valid for this product." At the time of writing (late 2024/early 2025),
Launched in 2011, ESET Smart Security 5 was revolutionary. It bundled antivirus (NOD32) with a firewall, antispam, and exploit protection. At the time, users loved it because a single "Username and Password" (often formatted as EAV-XXXXXXXXX for antivirus or TRIAL-XXXXXXXX for trial accounts) could unlock 30 to 90 days of protection.
The keyword you are using reveals a specific need: You want a paired username and password—not just a license key. This is because ESET versions 4, 5, and 6 used a two-factor credential system: If you try to enter this today, ESET
When you entered these into the "License Manager," ESET would connect to its servers to validate them.