You can easily download the ESET security program and start using it on your device. To activate the subscription, you need to use the activation code. Some users may face issues while activating their ESET product. This problem can happen due to the wrong activation code or any other reasons. If you are facing this problem, then here are the quick solutions you can follow. 

Below are the two most effective solutions that will help you fix the ESET product activation problem on your device. 

Method 1: Use the Right License Key

  . Initially, launch ESET Internet Security and navigate to the Choose an Activation Option screen.

  . Select Use a Purchased License Key.

  . Type the License Key; ensure you use a valid license key.

  . When the process is complete, click Continue to see if you can activate it.

Method 2: Activate Using Email ID and Password

  . Go to the ESET and install it if you haven’t already.

  . Once you get to the login page, select Skip Login.

  . Select Use ESET HOME Account from the activation options.

  . Type the email address and make sure to avoid any mistakes.

  . Next, you need to enter the password, then click Login.

  . Inspect and see if you’re able to activate it.

Source:- Resolve ESET Product Activation Failed Error