What is Ereg.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the Ereg.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Ereg.exe file information

Windows Task Manager with Ereg
Ereg.exe process in Windows Task Manager

The process known as Product Registration or Ereg (Unicode version) or SSEreg MFC Application or Ereg MFC Application

belongs to software PowerReg or Dragon NaturallySpeaking (version 8, 12, 10, 13, 11) or Nuance PDF Reader or ScanSoft PaperPort (version 11) or Logitech Webcam Software or Ereg Application or Nuance PDF Converter Professional (version 8, 7) or Nuance PDF Professional (version 5)

by Nuance Communications ( or Leader Technologies/Logitech ( or ScanSoft (

Description: Ereg.exe is not essential for Windows and will often cause problems. The file Ereg.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 328,992 bytes (31% of all occurrences), 729,088 bytes and 12 more variants. 
The program has a visible window. The software is loaded during the Windows boot process (see Registry key: MACHINE\Run, User Shell Folders, Shell Folders, DEFAULT\User Shell Folders). The file is not a Windows system file. The program can be removed using the Control Panel's Add\Remove programs applet. The Ereg.exe file is digitally signed. Ereg.exe is a Verisign signed file. There is no information about the author of the file. Ereg.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 5% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can do the following:
  1) uninstall the software ScanSoft PaperPort 11 or erLT using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program)
  2) contact Customer Service
  3) look for a new, improved version.

Recommended: Identify Ereg.exe related errors

External information from Paul Collins:

Important: Some malware camouflages itself as Ereg.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the Ereg.exe 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.


User Comments

Ereg Application = Dragon NaturallySpeaking C:\Program Files\Nuance\NaturallySpeaking9\Program\
A file called eReg.exe is also part of Logitech's product registration.
Got this loaded by Brother Multi-printer model number DCP-7040, some of the software somehow related to Nuance software, also makers of Dragon NaturallySpeaking.
  Scraps, Long Island, NY  
My version inspired by a Logitech registration scheme
My version is also related to Logitech (my bluetooth mouse to be exact)
C:\Program Files\Common Files\Logishrd\eReg\SetPoint
It is used by Logitech to bring up a registration request... at least, that's the only time I see it.
This is such a CPU hog...nothing happens when i kil the process
  Annoyed user.  
I got it from my wirelss mouse, but I also get 2 of them in my Startup
Can be from many sources, including Malware. Use Uninstall Tool by Crystalidea or Revo Uninstaller and go to Hidden or System to find and remove it!
  Sam S.  
Yes, It has been installed along with Logitech mouse. this is for the registration process. I found it with Revo Uninstaller and now I'm getting it off my system.
Came with Dragon
Appeared, and was flagged by WinPatrol, after installing an HP ENVY 5560 printer. Registration of the new printer & associated software already had been completed via the HP web site. Printer seems to be working well without installing EREG.EXE

Rating chart

Summary: Average user rating of Ereg.exe: based on 20 votes with 13 user comments. 2 users think Ereg.exe is essential for Windows or an installed application. 2 users think it's probably harmless. 14 users think it's neither essential nor dangerous. 2 users suspect danger. One user is not sure about it.

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Best practices for resolving Ereg issues

A clean and tidy computer is the key requirement for avoiding problems with Ereg. 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 Ereg.exe 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

Ereg.exe [all]