ESET does not offer a free consumer version. However, they often run promotions. Alternatively, switch to (Windows 10/11). It is now rated higher than most paid third-party AVs in independent lab tests (AV-Test, AV-Comparatives).
Products that have reached End of Life typically stop receiving virus signature database updates and technical support, leaving systems vulnerable to new threats. Modern Replacement: ESET Smart Security has been replaced by ESET Internet Security Eset Smart Security 5 Username And Password Nod32 Keys
ESET provides a tool to convert these old credentials into a modern 20-character License Key through the ESET License Converter Activation: ESET does not offer a free consumer version