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Having trouble with your ESET Antivirus

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Q1: Please Choose Your ESET Product:

Product key not working

When you purchase an ESET product from a retailer, you will receive a product key card in the box and the product to activate it. And if you have purchased the product online from ESET’s official site, you will receive an activation code on your registered email id. When you install the ESET product on your computer, you must enter the product key to activate it. The process is straightforward, but the product key not working in certain situations. Go through our content to learn about the causes and solutions to this issue.


  • Incorrect product key: It is a human error, which means the user is typing the incorrect product key.
  • The product key is not yet activated: If you purchased ESET from a retail store, then the chances are that the retailer has not yet activated your product key.
  • Used product key: If the product key has already been used by someone else.

Solution 1: Make sure you are entering the right product key.

  1. Open the ESET Endpoint Antivirus main program window, and in the main menu, click Help and Support.
  2. Next, select Activate product or Protection status, followed by Activate product.
  3. Now carefully enter your product key as it is written on your card or in the email you received.

Solution 2: Contact the retail agent

  1. The first thing you need to do is contact the retail agent from whom you purchased the ESET product.
  2. Next, ask them to activate your product key.
  3. Once the product key is activated, try entering your product to check if the key is working or not.
Antivirus Support

Frequently Asked Questions (FAQ's)

You will receive a unique username, password, and license key with the ESET product license. The license key allows you to download the latest version of the ESET product and receive ongoing program content and virus signature updates. Licenses can be purchased for one, two, or three years. When your ESET product license expires, you can continue to use the software, but you won’t be able to download the signature or a program update.

Unfortunately, no. All ESET Business products, including ESET Endpoint Antivirus, ESET Endpoint Security, and ESET Server Security for Microsoft Windows Server, require a license key during activation, which you receive from the company after you purchase a license. If you don’t have a product key, you can convert your username and password into a license key to activate a business product.

If you didn’t receive the ESET product license key, then you must follow the steps mentioned below:
  1. First, check your inbox's junk, spam, and promotions folders.
  2. If your license key is not there, request to have your license key emailed to you.
  3. You will receive the Licence Key that was generated for you at the email address that you provided while purchasing or registering the license.

For a single operating system, you require one license. For instance, you must purchase two licenses if you have a file server and a printer server. And if you want to protect multiple client sessions on your server, you must install ESET Server Security for Microsoft Windows Server on each instance.

Unfortunately, no. At present, ESET does not offer a license extension program, but you can renew your license up to 90 days prior to its expiration date. If you renew your license before your expiration date, then your new expiration date will not take effect until your original expiration date. If you forget to renew your license, you will get a 14-day cooling period during which you can renew your product.

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