| Format | Example | Where to find it | |--------|---------|------------------| | | XXXX-XXXX-XXXX-XXXX-XXXX | Email, printed card, or ESET account | | Activation code (older) | XXXX-XXXX-XXXX | Retail box or digital receipt | | License file ( .lic ) | license.lic | Business licenses or offline installations |
When you purchase a new license for an ESET security product (like NOD32 Antivirus, Internet Security, or Smart Security Premium), the first and most critical step is verifying that the license is valid, active, and properly linked to your product. Simply entering a license key without checking it first can lead to activation errors, subscription mismatches, or even security risks if you obtained the key from a third-party reseller. eset check license key new