What is LuComServer.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.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.EXE file information

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

Description: LuComServer.EXE is not essential for Windows and will often cause problems. LuComServer.EXE is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 1,590,472 bytes (40% of all occurrences), 1,590,424 bytes, 1,541,784 bytes or 774,144 bytes. 
The program has no visible window. It is not a Windows system file. LuComServer.EXE is a Verisign signed file. The file has a digital signature. The process uses ports to connect to or from a LAN or the Internet. LuComServer.EXE is able to monitor applications. Therefore the technical security rating is 36% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you encounter difficulties with LuComServer.EXE, you can also remove the entire program LiveUpdate using Windows Control Panel.

Recommended: Identify LuComServer.EXE related errors

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

always freezes my computer when it loads
  Dawn Griggs  
Not sure what it is I get it on email as other things
  Ralph Jackson  
Part of Norton/Symantec live update for virus defintions
If it's the real exe from Symantec then it's part of Norton Internet Security
My PC shows that Symantec installed it to the Symantec directory. So I guess my file is OK
Symantec AntiVirus update
  Mike J Hebblethwaite   (further information)
Belongs to Symantec Internet Security Live Update. If you use this products, then it's okay. However, after completely removing the Symantec Internet Security Suite, this program remains to nag you about updates. It has many hooks into the registry, and is very annoying. I consider this to be adware behavior and should not be tolerated.
  former symantec customer  
Norton update
Its a pain in the arse as it takes all of my cpu and i cant do nothing while its running...i`d rather not have norton internet security...The free antivirus ones are much more better
It's part of Symmantic Live Update COM Engine if it's located at c:\Program Files\Symantec\LiveUpdate\
Like others say, it's part of norton and very annoying and freezes up my computer very time I sign on and start a search.
Lucomserver seems to at like adware, it slows down my pc , i think this should be further checked out it might be an infringement on privacy by symantec
might as well be adware. it pops up all the time and lags my computer. i really dont see the point of it.
I seem to be unable to get Live Update off my computer and therefore cannot install my new antivirus software. It is very aggravating!!!!!
  Nancy C. Simmons  

Rating chart

Summary: Average user rating of LuComServer.EXE: based on 15 votes with 14 user comments. 4 users think LuComServer.EXE is essential for Windows or an installed application. One user thinks it's probably harmless. 7 users think it's neither essential nor dangerous. One user suspects danger. 2 users think LuComServer.EXE is dangerous and recommend removing it. 6 users don't grade LuComServer.EXE ("not sure about it").

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Best practices for resolving LuComServer issues

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

LuComServer.EXE [all]