ESET Online Help

Search English
Select the topic

Activation failed – common scenarios

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

Activation key is already in use.

You have entered an invalid activation key.

Information in the activation form is missing or invalid.

Communication with the activation server failed.

No connection or disabled connection to ESET activation servers.

Verify that you entered the proper activation key and your internet connection is active. Try to activate ESET Smart Security Premium again. If you use an ESET HOME account for activation, see the ESET HOME Subscription and subscription management - Online Help.


If you receive a specific error (for example, Suspended subscription or Overused subscription), follow the instructions in subscription status.

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