ESET NOD32

ApplicationESET

Also called nod32, eset nod32, eset internet security, ekrn

ESETSecurity

A Slovak antivirus. People still search NOD32. The kernel service is ekrn.exe. It is not Windows Security.

What you need to know

NOD32 is the search name. ekrn.exe is the ESET engine.

ESET is a Slovak vendor. NOD32 still means the consumer antivirus. Internet Security is a thicker SKU. ekrn.exe should take the slot from Windows Security. Two live engines is the conflict.

What is it?: Slovak AV. NOD32 is the old name
Process?: ekrn.exe
Plus Defender?: No. One live engine

Feex says

If ekrn.exe is busy, I would treat it as ESET, not Defender. NOD32 is the old name on the box. I would not run it live next to MsMpEng.exe.

What is ESET NOD32?

ESET NOD32 is the consumer search name for ESET's Windows antivirus. ekrn.exe is the resident kernel service.

If you have never used it

If you searched NOD32, that is ESET's old consumer name. The company is Slovak. Download from eset.com. ekrn.exe is the kernel service. NOD32 Antivirus is the thinner SKU. Internet Security and Smart Security add extras. ESET should take the antivirus slot. ekrn.exe plus live MsMpEng.exe is the two-engine fight. This is not Defender.

What is it used for?

Resident antivirus

ekrn.exe is the ESET engine. It should own realtime so Defender goes passive.

NOD32 versus Internet Security

NOD32 is antivirus. Internet Security adds firewall and extras. Same vendor, different cart item.

Business Endpoint versus home

ESET PROTECT is the work console. This article is the home NOD32-class install.

Who is it for?

People who still type NOD32 into a search box
Users who bought Internet Security and expected only the old NOD32 window
Anyone with ekrn.exe next to a live Defender scan

Current status

Actively developed. This article is consumer ESET on Windows, not ESET PROTECT enterprise.

How old is it?

ESET dates to 1980s Bratislava antivirus work. NOD32 is the name people still type. Current Windows storefronts also say Internet Security. A floppy-era NOD32 is not what ekrn.exe is today.

Versions

Major channels first. Exact build numbers are not all verified here.

NOD32 Antivirus

Internet Security

Smart Security Premium

System requirements

Values follow the publisher's public guidance. Workload still changes the real need.

Minimum

Minimum system requirements
Operating system	Windows 10 or Windows 11, per current ESET home pages
RAM	ESET lists a 1 GB to 2 GB class minimum on older pages. 4 GB is the comfortable class

Resource profile

CPU demand: Idle ekrn.exe plus scans
Disk demand: Full scans walk the drive

Installed processes

These executables belong to this product when it is installed.

Installed processes
ekrn.exe	ESET kernel service
egui.exe	ESET GUI on many installs

Startup components

ekrn.exe starts with Windows while ESET owns protection.

File locations

Common ESET NOD32 locations
Typical install	C:\Program Files\ESET\ESET Security\

Common problems

ekrn.exe plus live Defender

ESET should own realtime. If Microsoft Defender is still the owner, both products scan the same files.

NOD32 name on an Internet Security license

The window chrome can still say ESET while the license includes firewall extras. Check the account SKU.

Getting unstuck

Open Windows Security and read the owner

It should name ESET after install. Defender still active is the two-engine case.

Confirm ekrn.exe under Program Files\ESET

A random ekrn.exe in Temp is not the Slovak vendor.

Use eset.com, not a "NOD32 keygen" host

License keys from comment sections are not ESET support.

Alternatives

Windows Security if you want the in-box engine. Do not stack ESET on Bitdefender or Norton.

Official help and downloads

Start with the vendor. Random exe sites are not a support channel.

Official contacts
Download	www.eset.com/ Official installer or vendor page
Help	support.eset.com/ Vendor support
Official site	www.eset.com/ Start here, not a random exe host

Related hardware

ESET is often lighter than older suites, but a full scan still walks the disk. HDD is the slow case.

Technical details

Vendor version numbers change. This article does not pin a build.

Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. How we research.

ESET NOD32 official site · Vendor product page
ESET NOD32 help · Vendor support
Foxhole process map · First-party samples on Windows PCs. Not a lab benchmark.

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