By default, ESET Security Products check every hour for a new update and are updated at least once a day with new virus definitions and occasional program component updates. These updates are the most important aspect of your computer's security. To verify that the latest virus signature updates have been received, follow the steps below.

To determine which version of the product you should download, first determine whether you have a 32-bit or 64-bit operating system. To do this, follow the steps for your operating system.

ESET Smart Security and ESET NOD32 Antivirus 3.0 check every hour for a new update, and are updated at least once a day with new virus definitions and occasional program component upgrades. The update will fail if your username or password is invalid or entered incorrectly. You can make sure the username and password information is correct by following the steps below.

With the purchase of an ESET NOD32 license, you will receive a unique username and password that allows you to download the latest version of ESET NOD32, as well as receive ongoing program component and virus signature updates. The number of licenses purchased equals the number of computers ESET NOD32 will be used on-i.e., a 4-User Pack is valid for four separate computers.

An update failure can be attributed to many variables. Firewalls, proxies, and other software can interfere with the connection. The internet connection could have failed, or the update parameters could be incorrect. Be sure to check the following if you receive a "Virus Signature Update" error.

If you have forgotten or lost your username and password, please click here to access our lost license page. If you are looking for just your username in the program settings, please see the information below. Following the purchase of ESET NOD32 Antivirus 3.0 or ESET Smart Security, registered users receive an email containing a username and password. This username and password must be entered into the program to allow virus signature updates to be properly downloaded to your computer. In addition, to offer you the most timely response possible, this username will be required when requesting assistance from our Customer Care Department.

In order to protect your ESET NOD32 Antivirus or ESET Smart Security configuration settings, the program provides an option to establish a user-defined or administrative password to access these settings. This password is separate from the product username and password which was emailed to you upon purchase of the product.

In many cases, our analysts can more effectively troubleshoot your issue if they have access to your ESET NOD32 and System information. In addition, if you are submitting a Support Request using our online form, you must copy and paste this information into the Product Details section of that form. To look up your System Information in ESET Smart Security/ESET NOD32 Antivirus 3.0, follow the steps below:

If the ESET Smart Security Antispam toolbar is missing from Microsoft Outlook, it may be due to an incorrect installation, a corrupted uninstall, or other errors in the program. Outlook also may have blocked the library required to launch the ESET Smart Security plugin. To resolve the problem, please follow the steps below

ESET Smart Security's Personal firewall provides the ability to create a specific list of approved (whitelisted) web sites that may be accessed on a computer. To configure the Personal firewall so that only approved web sites can be visited, please follow the steps below