Solution
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To ensure you have the correct activation key, retrieve your lost or forgotten ESET subscription. If you do not receive an Activation key, there is no subscription registered to the email address you provided.
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Type or copy/paste the Activation key from the email you received and ensure that the Activation key:
- Is in the correct format XXXX-XXXX-XXXX-XXXX-XXXX (24 characters long, including hyphens)
- Does not have any blank spaces before and after
- Is exactly the same as in the email (has hyphens, is uppercase)
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If your Activation Key still does not work:
- Your subscription might have expired, renew your subscription
- If you do not know the expiration date of your subscription, visit the retrieve your lost or forgotten ESET subscription web page to have this information emailed to you
- You never received an email from ESET containing your Activation Key
- Update your account after an email address change
- If you recently renewed your subscription, wait 24 hours before downloading new ESET application versions or upgrading
- Ensure you downloaded the correct application for your subscription (check your subscription email from ESET)
- Clear the update cache in your ESET Windows home application
