What is ehdrv?

The genuine ehdrv.sys file is a software component of ESET NOD32 Antivirus by ESET.
The file is part of ESET Smart Security and is developed by ESET. It's a system and hidden file. ESET antivirus software provides protection against spyware, phishing, gamer mode, social media and device control. ESET is an IT security company whose headquarters are in Slovakia. It was founded in 1992 by the merger of two private companies.

EHdrv stands for ESET Helper driver

Ehdrv.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if ehdrv.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for ehdrv drivers in need of updating

Ehdrv.sys file information

The process known as ESET Helper driver or eapihdrv belongs to software ESET NOD32 Antivirus or ESET Smart Security by ESET (

Description: Ehdrv.sys is not essential for the Windows OS and causes relatively few problems. The ehdrv.sys file is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 115,008 bytes (50% of all occurrences), 120,152 bytes, 107,256 bytes or 108,792 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. Ehdrv.sys is a Verisign signed file. The file has a digital signature. The ehdrv.sys file is not a Windows core file. The application can be removed using the Control Panel's Add\Remove programs applet. ehdrv.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous.

Uninstalling this variant: In case you experience problems using ehdrv.sys, you could also uninstall the program using the Control Panel ⇒ Uninstall a ProgramESET NOD32 Antivirus or ESET Smart Security.

Recommended: Identify ehdrv.sys related errors

Important: Some malware disguises itself as ehdrv.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the ehdrv.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


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Best practices for resolving ehdrv issues

A clean and tidy computer is the key requirement for avoiding problems with ehdrv. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the ehdrv.sys process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

ehdrv.sys [all]