The default scan settings for ESET Smart Security and ESET NOD32 Antivirus are configured to maximize your computer's performance and security protection. However, some options are not enabled within the default profile due to the amount of time required to scan and the possibility of conflicts with existing software. You can enable these options by following the steps below

Many malicious programs such as bots, Trojan horses, viruses and worms falsify the real sender's address with a random one selected from the address book of the infected computer. If your name and email are listed in the address book of someone else's infected computer, that person may have unknowingly sent an infected email message using your name. In this scenario, you might receive a message from the new recipient's antivirus software stating (falsely) that you had sent an infected email message.

Installing NOD32 via the Remote Administrator Console can occasionally generate a GLE error. To find the meaning of any GLE error number, follow the steps below

In addition to comparing potential malware against known virus signatures, all ESET NOD32 products employ the use of heuristics in detecting viruses, trojans and other threats. Heuristics is a technique which implements a set of guidelines or rules in order to problem solve efficiently. In an antivirus context, heuristics are a set of rules used to detect malicious program behavior without needing to uniquely identify the specific threat, as is required by classic signature-based detection. The primary advantage of the heuristic-based model is not only its ability to detect variants or modified forms of existing malicious programs, but also new previously-unknown malicious programs. ESET NOD32 Antivirus and ESET Smart Security use heuristics to detect both known and unknown threats and malware. Two forms of heuristics are used, Passive and Active.

ESET NOD32 Antivirus 3.0* is a hybrid program in that it contains both 32-bit and 64-bit program code. The engine and interface modules used by ESET NOD32 to protect a system from malware are the result of years of development to create highly-optimized x86 assembly language code. During testing, it was discovered that recompiling certain portions of the program to 64-bit code resulted in increased memory usage with no discernable improvement in performance, stability or reliability.

In ESET NOD32 Antivirus 2.7 and earlier, the LAN Update (Mirror) functionality was enabled through a separate modified client download. The Mirror functionality is now incorporated into the Business client download of ESET Smart Security and ESET NOD32 Antivirus 3.0. In addition, the ERA license file (nod32.lic) is now required in order to enable the Mirror functionality.

If you receive an error message while attempting to install NOD32 on a remote computer which is running the Windows XP operating system, the error message is likely due to one or more of the following problems

ESET Smart Security/ESET NOD32 Antivirus 3.0 gives users the ability to append notifications to outgoing or incoming email messages, indicating that the message has been scanned and is not infected. It is very simple to remove these notifications or set them to appear in infected email messages only. To remove the notifications or adjust their settings, follow the steps below

Rootkits use special techniques to prevent unauthorized files and processes from being detected using conventional means. Anti-Stealth technology is integrated into ESET NOD32 and allows the On-demand Scanner to detect and delete these objects, even when their presence has been hidden from the operating system. By default, Anti-Stealth is enabled in ESET NOD32 and is used automatically by the modules which require it.

By default, ESET Smart Security and ESET NOD32 Antivirus check for virus signature updates every hour. In cases where limited network resources or bandwidth necessitate less frequent updates, this setting can be changed. Changes to the timing of virus signature updates are made through the Scheduler/Planner module. To access the Scheduler, follow the steps below