What is LTSMMSG.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 LTSMMSG.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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LTSMMSG.exe file information

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

The process known as SoftModem Messaging Applet belongs to software Lucent SoftModem Messaging Applet or TOSHIBA SoftModem Messaging Applet by Lucent Technologies ( or LT (

Description: LTSMMSG.exe is not essential for the Windows OS and causes relatively few problems. The file LTSMMSG.exe is located in the C:\Windows folder. Known file sizes on Windows 10/8/7/XP are 32,768 bytes (85% of all occurrences), 45,056 bytes or 141,880 bytes. 
It is not a Windows system file. The application starts when Windows starts (see Registry key: MACHINE\Run). The program has no visible window. LTSMMSG.exe is an unknown file in the Windows folder. There is no description of the program. Therefore the technical security rating is 52% dangerous, however you should also read the user reviews.

Recommended: Identify LTSMMSG.exe related errors

External information from Paul Collins:

Important: Some malware disguises itself as LTSMMSG.exe, particularly when not located in the C:\Windows folder. Therefore, you should check the LTSMMSG.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

i dunno
Lucent Technologies Winmodem driver
Lucent Technologies Winmodem Driver
Modemtreiber Lucent
Well its from TOSHIBA So its not dangerous at all.
Have disabled the service and can still use comp :) In fact is now running faster and more stable. Is a general waste of valuable resources
  zoljaan   (further information)
Have deleted and my computer is working faster and better. It´s from Toshiba but not a part of my modem.
it's a resource hog. I killed it and I'm glad

Rating chart

Summary: Average user rating of LTSMMSG.exe: based on 11 votes with 8 user comments. 8 users think LTSMMSG.exe is essential for Windows or an installed application. 3 users think it's neither essential nor dangerous. 2 users don't grade LTSMMSG.exe ("not sure about it").

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Best practices for resolving LTSMMSG issues

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

LTSMMSG.exe [all]