This license key can not be applied from online account of ESET. This key can be applied only on the trial software to activate the premium edition. 
After activating the software, login to you ESET account from inside the software to connect the key with your ESET account.

ESET Internet Security is a security suite that offers a variety of features to protect your devices from online threats. Here are some of the key features:

• Multi-layered protection: ESET Internet Security protects you from a variety of threats, including viruses, malware, ransomware, phishing attacks, and botnets.
• Firewall: The built-in firewall helps to prevent unauthorized access to your computer and helps to protect your personal data.
• Webcam and Home Wi-Fi Protection: It helps you monitor and control access to your webcam and helps to identify and protect vulnerabilities in your home Wi-Fi network.
• Banking & Payment Protection: ESET Internet Security provides a secure browser for online banking and shopping. This helps to protect your financial information from hackers.
• Anti-spam: ESET Internet Security helps to keep your inbox clean by filtering out spam emails.
• Gamer Mode: Gamer mode helps to ensure that your games run smoothly by temporarily suspending non-essential system resources.
• Parental Control: It allows you to control what your children see and do online.

No Return/Refund