What is LuComServer_3_4.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 LuComServer_3_4.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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LuComServer_3_4.EXE file information

The process known as LiveUpdate Engine COM Module belongs to software LiveUpdate by Symantec (

Description: LuComServer_3_4.EXE is not essential for the Windows OS and causes relatively few problems. LuComServer_3_4.EXE is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 3,192,184 bytes (50% of all occurrences) or 3,220,856 bytes. 
The service can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. It is a Verisign signed file. The file has a digital signature. The file is not a Windows system file. The software can be uninstalled in the Control Panel. LuComServer_3_4.EXE is able to monitor applications. Therefore the technical security rating is 14% dangerous; however you should also read the user reviews.

Uninstalling this variant: There is a possibility to do the following:
  1) safely remove the program using the uninstall program of LiveUpdate (Control Panel ⇒ Uninstall a Program)
  2) search the support area on the Symantec website.

Recommended: Identify LuComServer_3_4.EXE related errors

Important: Some malware camouflages itself as LuComServer_3_4.EXE, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the LuComServer_3_4.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

Live-Update Dienst von Symantec, kann manuell ausgeschaltet werden.
Lots of space
If you go to your Norton settings and disable Auto Live Update, this will help. Just make sure to do your updates manually every morning, etc...
  Dave at Everwood Farm (retired CNE)  

Summary: Average user rating of LuComServer_3_4.EXE: based on 2 votes with 3 user comments. One user thinks LuComServer_3_4.EXE is essential for Windows or an installed application. One user thinks it's probably harmless. One user is not sure about it.

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Best practices for resolving LuComServer_3_4 issues

A clean and tidy computer is the key requirement for avoiding problems with LuComServer_3_4. 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 LuComServer_3_4.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

LuComServer_3_4.EXE [all]