ESET Internet Security

Description

By 2024, ESET’s NOD32 engine had collected more than 100 Virus Bulletin 100 percent awards from the British malware research publication — more than any antivirus product in the award’s history. That count reflects how ESET built its reputation: on detection accuracy and consistency over decades, not on feature volume and aggressive marketing. ESET Internet Security is the mid-range product in ESET’s three-tier consumer product line, between the entry-level NOD32 Antivirus and the premium Smart Security tier. It adds two-way firewall, anti-spam filtering, webcam protection, secured browser for online banking, parental controls, network vulnerability scanning and anti-theft capabilities to the core antivirus engine.

ESET stopped selling ESET Internet Security as a new product name and replaced it with ESET HOME Security Essential, which has the same feature set under a redesigned subscription structure. Existing ESET Internet Security subscribers receive their protection until expiry and upgrade to HOME Security Essential upon renewal.

HISTORY AND BACKGROUND

In 1987 two young programmers at a computing facility in Bratislava, Peter Pasko and Miroslav Trnka, came across a floppy disk containing malicious code that had arrived from abroad. Pasko took it apart and figured out how it worked, and wrote a removal program. They called the virus Vienna, after the city where the disk had come from. Vienna was one of the first computer viruses recorded in Eastern Europe and the response of the pair to it became the technical basis for NOD, their first antivirus software. The name was an acronym for “Nemocnica Na Okraji Disku” — Hospital on the Edge of the Disk — borrowed from a popular Slovak television series.

Communist Czechoslovakia forbade private enterprise, so Pasko and Trnka had no way of formalizing a business around the product. They sold copies on the black market and made their first million Czechoslovak crowns before the Velvet Revolution of November 1989 altered the political and economic order in the country. After the transition they hired Rudolf Hruby as a third co-founder and founded ESET as a limited liability company in Bratislava in 1992, named after the Egyptian goddess of protection.

ESET spent the 1990s developing NOD into a commercial product and introducing it into international markets. The company added Windows compatibility as the operating system overtook MS-DOS, and developed heuristic detection that identified previously unknown malware by analyzing code patterns rather than matching fixed definitions. Miroslav Trnka wrote a regular column on virus detection in PC Revue, Slovakia’s premier technology magazine, establishing the company’s name among technically-minded readers throughout the region.

A turning point was reached in 1998, when NOD32 received its first Virus Bulletin 100 percent award. Virus Bulletin, a UK-based security publication that has conducted comparative tests since the early 1990s, gives the 100 percent designation to a product that detects all in-the-wild viruses in testing with no false positives. The award gave NOD32 visibility among international distributors who had previously looked primarily to US and UK vendors. Anton Zajac, who would later join as a co-owner, helped to establish ESET LLC in San Diego, California in 1999 to anchor the American distribution effort.

Through the 2000s, ESET has won AV-Comparatives overall antivirus test in both 2006 and 2007. The product line expanded from the core antivirus into ESET Smart Security in 2007, which first introduced the integrated firewall, anti-spam, and parental control functionality. ESET Internet Security later became the renamed mid-range product between the pure antivirus NOD32 and the premium Smart Security Premium tier.

Richard Marko, who joined ESET in 1994 and was Chief Technology Officer, became CEO in 2011. He and the other founders retained private ownership through the growth of the company. ESET has never accepted outside investment, listed on a stock exchange, or accepted acquisition offers — a contrast to its peers like Avast, which listed in London in 2018 before merging with NortonLifeLock, and AVG, which listed in New York in 2012 before being taken over by Avast.

AV-Comparatives named ESET its Product of the Year for 2024 after ESET achieved the Advanced+ level in all seven consumer tests that year. Many antivirus products have high detection rates but are noticeably slower; ESET is consistently near the top in performance benchmarks, fifth out of seventeen products in AV-Comparatives November 2024 Performance Test. As of 2025, ESET defends more than 1 billion users in 22 offices around the world, with the main research and development still based in Slovakia.

KEY FEATURES

ESET Internet Security (now sold as ESET HOME Security Essential) is based on ThreatSense, ESET’s detection engine since the NOD era. ThreatSense combines signature-based detection, heuristic analysis, machine learning and cloud reputation lookups via ESET LiveGrid, which cross-references suspicious files against a database populated by the global ESET user base. A file that raises suspicion has its reputation checked against millions of other similar queries before ESET takes action, keeping the false positive rate low.

Real-time file system protection scans files when they are accessed — when a document is opened, a download is finished or a program is executed. ESET Exploit Blocker focuses on attacks embedded in legitimate application types such as PDFs, Office documents, browsers and scripts by monitoring running applications for behavioral patterns instead of checking file contents. Script-Based Attack Protection includes malicious JavaScript and PowerShell scripts. UEFI Scanner goes below the operating system to scan firmware in UEFI chips against malicious changes that survive OS reinstalls.

The personal firewall is set by default to automatic mode, which blocks inbound connections that are not initiated by the user, and allows all outbound traffic. Users who desire more control can use interactive mode, where ESET asks for a decision whenever an application tries to connect to the network outbound. The firewall features Network Attack Protection, which identifies and blocks exploits that are sent via network traffic, and Botnet Protection, which identifies and interrupts command-and-control communication patterns even when the traffic appears legitimate.

Safe Banking and Browsing opens a hardened browser session when users visit recognized financial institutions, cryptocurrency exchanges or payment processors. The mode is used to encrypt communication between the keyboard and the browser, defeating keyloggers that intercept keystrokes at the driver level. Users can manually add to the list of sites that cause the protected session to occur automatically any URL they wish. Webcam Protection works on the basis of a configurable rules engine: users set permissions per application, and ESET prevents any application that is not explicitly allowed from accessing webcam hardware.

Network Inspector scans the home router and connected devices for configuration vulnerabilities, such as default credentials, outdated firmware, and open ports. Parental Controls include website category blocking and activity logging, but the controls are basic compared to dedicated parental control products — they filter content categories but do not allow time of day restrictions. Anti-Spam integrates with Microsoft Outlook and flags messages according to header analysis, content scoring and sender reputation.

Anti-Theft, which is included for Windows laptops and desktops, allows users to find a device via the ESET HOME web portal if it is lost. The feature generates a phantom Windows account — a fake user profile a thief sees at login — while the owner can see webcam snapshots, screenshots and approximate location based on nearby Wi-Fi networks. ESET cannot wipe the drive remotely. Gamer Mode disables scan scheduling and notification pop-ups when a full screen application is running.

The ESET HOME portal and companion mobile app offer remote monitoring of all the protected devices under a subscription. AV-TEST gave ESET a perfect 6.0/6.0 in protection, performance and usability in May-June 2025. AV-Comparatives gave ESET Top-Rated Product for 2025, with the Gold Award in the Advanced Threat Protection Test.

ESET HOME Security Premium (formerly Smart Security Premium), which includes ESET LiveGuard, a cloud sandbox that detonates suspicious files in an isolated environment before they execute locally, file and removable media encryption, and a password manager.