What is lucoms~1.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 lucoms~1.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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Lucoms~1.exe file information

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

Description: Lucoms~1.exe is not essential for the Windows OS and causes relatively few problems. The lucoms~1.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 2,999,664 bytes (66% of all occurrences) or 7,168 bytes. 
The service can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. Lucoms~1.exe is a Verisign signed file. The file is digitally signed. File is hidden. The lucoms~1.exe file is not a Windows system file. Lucoms~1.exe is able to monitor applications. Therefore the technical security rating is 58% dangerous, however you should also read the user reviews.

Recommended: Identify lucoms~1.exe related errors

Important: Some malware camouflages itself as lucoms~1.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the lucoms~1.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 is part of Symantec internet security
part of live update from norton antivirus
Part of Norton Antivirus Live Update.
    (further information)
i can't play on line he make me lag a lot i need kill it!
norton antivirus
It's Symantec LiveUpdate Server
  Siebe Spronk  
Part of LiveUpdate for symantec's antivirus program
i think it slows down my computer and msn messenger doesnt work because of it
  Saiyam Vora  
LiveUpdate from Symantec NAV
Part of NAV
lucoms.exe is a part of Symantecs Internet security suite and deals with mainly live updates, which keep your product upto date from the latest security threats. This program is important for the stable and secure running of your computer and should not be terminated.
Norton Internet Security/LiveUpdate
  Billy Bobb  
Save, Norton's LiveUpdater
It appeared in my taskmanager processing list suddenly after installing a keylogging software. On the news 1/16 or 1/17/06 there was report of Symantec admission of spyware loaded into their security package. Makes me wonder what's up?
i was wrong about saying that it slows down my computer...its a part of NAV..i figured there was some other porblem on my computer
  saiyam vora  
set the time for live update, when ur not playin'^^
Norton LiveUpdate, just keep it
  Mace V  
Norton security update program; however some viruses disguise themselves as lucoms~1.exe
  Matthew   (further information)
confusion about Lucoms~1.exe
is on my computer and i don't use norton
It may be the w32.beagle trojan. see symantec for removal tool
  mnymakr   (further information)
Part of a bloated antivirus/internetsecurity suite. solution: uninstall nortons and find something better
Could be for Symantec LiveUpdater or a cloaked email worm, if it is found in system32
Live Update for Ghost
Turn off automatic live update. Now lucoms~1.exe should not execute by itself anymore, so if you have not initiated norton update manually,but still appears in the task manager it is a virus/worm disguised as norton.
Symantec Program. If people are experiencing lag, or poor performance because of it, it suggests a deeper problem that may require re-installation your Symantec software; Symantec would be happy to help you do this - most software providers offer free support for installation issues. Removing this program, or even shutting it down temporarily, may leave your PC open to threats - this is likely to slow your computer down more!!!
it uses a lot of capacity. Apparantly I am downloading a lot since 4 days and there is nothing else in my computer which could be the source of it
lucoms~1.exe is a file that imitates a luveupdate file. Search hard drive for file name and look at properties. if under prefetch with no properties, delete.
  Paul G  
It randomly appears on my computer and lags it, so i have to end it with Task Manager.
Norton live update, but sucks up memory
  Jimmy J  
It is definately spyware, If you open your Windows Task Manager, you can see it running. I have been copy and pasting to my Word for documentation and find that if I open the Task Manager, the guy or gal from India will jump off as they know I know they are on my system. Look at your history's and trail and you will see their footprint. Symantec does not control the subcontractor to their subcontractor in India. After assistance from their help desk last year, I found my India "friend" signed on my computer twice. I had to call another software company to kill the stolen link program.
  Random Access  
It's part of Norton's Live Update, but mine seemed to be eating at my cpu speed. Just adjust settings. You can even manually start update vice the automatic option. No biggy, either way.
It is part of NAV update, but on my comp. it runs even if the auto update is turned off. but NAV says update is already being run by another user when lucoms is running, so pretty sure its a bug in their system.
LUCOMS~1.exe is annoying. It launches upto 10 other Localcallbackproxys bogging my system for a short while, it also does this several times and task manager cannot stop mine. Bootsector begone with her!
It seems to be a Norton thing for live update for me as well. it comes up when i start my computer in the process list but after i few mins goes away. i did a search and all references to it have to do with norton, now if you dont have norton then you probably have the virus.
LiveUpdate communications for any symantec product.
Remove Symantec and Install Another Software. Symantec is nothing but problems.
Turn on computer, walk away for a half hour, it's work will be done when you get back
as far as I can tell its just another pesky lefdtover from norton deletion
  Lilly Rose  
It is the process for LiveUpdate of Symantec Endpoint Protection 11' s new virus definitions and protection signatures.

Rating chart

Summary: Average user rating of lucoms~1.exe: based on 45 votes with 40 user comments. 24 users think lucoms~1.exe is essential for Windows or an installed application. 4 users think it's probably harmless. 8 users think it's neither essential nor dangerous. 3 users suspect danger. 6 users think lucoms~1.exe is dangerous and recommend removing it. 6 users don't grade lucoms~1.exe ("not sure about it").

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Best practices for resolving lucoms~1 issues

A clean and tidy computer is the key requirement for avoiding problems with lucoms~1. 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 lucoms~1.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

lucoms~1.exe [all]