Self-Defense
Self-Defense is a useful feature protecting our processes and registry keys against malware trying to disable or negatively affect computer’s protection status.

ESET SysRescue
ESET developed an entirely new wizard for creating CD and USB key for system boot-up. After installing the Microsoft Windows Automated Installation Kit v1.1, the wizard is able to create bootable image with the installed Antivirus. The ISO image is burned on CD or any bootable mass storage device, such as USB key. Users can subsequently boot the computer from this recovery medium, scan as well as clean the infected system and reboot afterwards.  

Improved Cleaning
Now cleaning of problematic files is possible through using the solution’s own driver, which is activated immediately after startup of the computer and ensures reliable cleaning of malware.

Portable Computer Support
This feature enhances the usability on portable computers (notebooks, laptops, etc.). Version 4 is able to identify whether the computer is running on battery and automatically postpone some scheduled tasks, alerting the user before downloading a large update.

Exchangeable Media Access Control
Exchangeable media is increasingly used to spread viruses and malware. When plugged-in a USB key can be used to transfer a hidden virus, affecting even computers without internet access.  Therefore, it is crucial to control the use of exchangeable media. and stem this vector of infiltration. Prevention of exchangeable media-borne threats is especially important across companies, where a lot of data is transferred physically between workstations. Version 4 offers a solution whereby the access to exchangeable media (USB devices, floppy disk and CD) can be refused by the administrator – a policy   that can also be administered across large networks via ESET Remote Administrator console. Furthermore, automatic scanning option for files executable from exchangeable media is included by default; the use of Advanced heuristics option can be selected for enhanced protection.

Informative Graphs and Statistics
Graphs depicting network communication (uploads/downloads), disc operations (writing on and reading from disc), as well as virus and anti-spam statistics are included and easily accessible from the GUI. 

Advanced Categorization of Infiltrations
ESET introduces three categories of infiltrations – malware, potentially unwanted applications (including adware, toolbars, etc.) and potentially unsafe applications (conform applications, which may represent a certain security risk). In version 4, the categorization was improved to ensure better distinction between the three risk-categories. Now, potentially unwanted and unsafe applications are represented by the yellow alert/status in ESET Smart Security/ESET NOD32 Antivirus. The user can easily discern the level of risk and intuitively distinguish between various types of infiltrations. Furthermore, the user is provided the option to exclude potentially unwanted/unsafe applications from the scanning procedure.

Smart Optimalization
Smart Optimalization is designed to streamline the scanning of your system for malicious code. When enabled, it increases the scanning speed, without diminishing or negatively affecting the security of your system.

HIPS
Host Intrusion Prevention System (HIPS) protects your system from malware or any unwanted activity trying to negatively affect its security status. It utilizes advanced behavioral analysis, coupled with the detection capabilities of network filter to monitor running processes, files and registry keys, actively blocking and preventing any such attempts.

Other Improvements
Version 4.0 includes more than 50 improvements compared to the previous version, among them also a pasword protected uninstallation, easy access to the last on-demand log, CISCO NAC support, advanced scanner settings and others.