Activation failed – common scenarios

If the activation of ESET Internet Security is not successful, the most common scenarios are:

License key is already in use

Invalid license key. Product activation form error

Additional information necessary for activation is missing or invalid.

Communication with the activation database failed. Try to activate again in 15 minutes.

No connection or disabled connection to ESET activation servers

Verify that you entered the proper license key and try to activate it again. If you use ESET HOME account for activation, see the ESET HOME License Management - Online Help.

If you still cannot activate, the ESET Activation Troubleshooter walks you through common questions, errors, and problems about activation and licensing (available in English and several other languages).