What is J2GDllCmd.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 J2GDllCmd.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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J2GDllCmd.exe file information

Windows Task Manager with J2GDllCmd
J2GDllCmd.exe process in Windows Task Manager

The process known as eFax Messenger - DLL Command Utility belongs to software eFax Messenger by j2 Global Communications (

Description: J2GDllCmd.exe is not essential for the Windows OS and causes relatively few problems. The file J2GDllCmd.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 116,224 bytes (46% of all occurrences), 95,744 bytes or 107,008 bytes. 
It is not a Windows core file. The process starts when Windows starts (see Registry key: MACHINE\Run, Run, MACHINE\User Shell Folders). The program is not visible. J2GDllCmd.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 41% dangerous; however you should also read the user reviews.

Uninstalling this variant: You could also turn to the software developer, Efax, for advice or completely remove eFax Messenger or j2 Messenger (Control Panel ⇒ Uninstall a Program).

Recommended: Identify J2GDllCmd.exe related errors

Important: Some malware camouflages itself as J2GDllCmd.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the J2GDllCmd.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

It was installed on my computer when I installed efax messenger software
  Mike Huff  
part of the efax suite, just some crappy TSR program hogging memory
It seems to cause IE6 to NOT terminate when closed. This leads to a build-up of unterminated Internet Explorers, eventually causing the machine to "run out of memory" until they are closed.
Not needed by efax, but is useful if you use it a lot
Just a memory hog

Summary: Average user rating of J2GDllCmd.exe: based on 5 votes with 6 user comments. 3 users think J2GDllCmd.exe is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user suspects danger. 3 users don't grade J2GDllCmd.exe ("not sure about it").

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Best practices for resolving J2GDllCmd issues

A clean and tidy computer is the key requirement for avoiding problems with J2GDllCmd. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the J2GDllCmd.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

J2GDllCmd.exe [all]