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What is tmmon.dll?

tmmon.dll is a Dynamic Link Library (DLL) file associated with the Trend Micro UMH Monitor Engine. This file is developed by Trend Micro, a global leader in cybersecurity solutions. It is typically located in the C:\Windows\System32\tmumh\20019\TmMon\2.9.0.1016 directory.

The associated software, Trend Micro User Mode Hooking (UMH), is a part of Trend Micro's security solutions. It is designed to monitor and control system activities in user mode, which is a less privileged state of operation for running tasks on a computer. This helps in detecting and blocking malicious activities, thereby enhancing the security of the system.

tmmon.dll is an essential component of the Trend Micro UMH Monitor Engine. It is needed for the proper functioning of the software, as it contains code and data that can be used by more than one program at the same time. This helps in promoting software efficiency and functionality.

Like any DLL file, tmmon.dll can sometimes cause problems. If the file is corrupted or missing, it may lead to software crashes or error messages. In such cases, you may need to remove or replace the file. If the file is identified as a threat or malware by your security software, it should be removed immediately to prevent potential harm to your system.

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Tmmon.dll file information

The process known as Trend Micro UMH Monitor Engine or Trend Micro UMH Monitor Engine (ENT) belongs to software Trend Micro User Mode Hooking or Trend Micro UMH by (www.trendmicro.com).

Description: Tmmon.dll is not essential for the Windows OS and causes relatively few problems. Tmmon.dll is located in a subfolder of C:\Windows\System32—in most cases C:\Windows\System32\tmumh\20019\TmMon\2.9.0.1016\. Known file sizes on Windows 10/11/7 are 1,454,568 bytes (25% of all occurrences), 1,412,160 bytes and 5 more variants. file.net/process/tmmon.dll.html 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The file has a digital signature. It can change the behavior of other programs or manipulate other programs. The program has no visible window. There is no detailed description of this service. The file is not a Windows system file. Tmmon.dll is able to record keyboard and mouse inputs, monitor applications, manipulate other programs and connect to the Internet. Therefore the technical security rating is 23% dangerous.

Recommended: Identify tmmon.dll related errors

If tmmon.dll is located in a subfolder of C:\Windows, the security rating is 9% dangerous. The file size is 1,369,064 bytes (25% of all occurrences), 1,156,096 bytes, 951,296 bytes or 1,378,192 bytes. It can change the behavior of other programs or manipulate other programs. The program has no visible window. It is not a Windows system file. The service has no detailed description. The tmmon.dll file is certified by a trustworthy company. The file is a Verisign signed file. Tmmon.dll is able to monitor applications, record keyboard and mouse inputs, manipulate other programs and connect to the Internet.

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

A clean and tidy computer is the key requirement for avoiding problems with tmmon. 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 executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.

To help you analyze the tmmon.dll 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. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.



Other processes

tmmon.dll [all]