What is CLMLService.exe?

The genuine CLMLService.exe file is a software component of CyberLink Media Suite by CyberLink.
CyberLink Media Suite is a suite of software applications designed for media playback, editing and image burning. CLMLService.exe runs a process that updates media information in the library accessed by PowerDVD and Power Cinema. This is not an essential Windows process and can be disabled if known to create problems. CyberLink Media Suite contains desktop programs such as PowerDVD, MediaShow, PowerDirector, PhotoDirector, PowerProducer, Power2Go, PowerBackup, PowerDVD Copy, LabelPrint, MediaEspresso, and InstantBurn, as well as mobile applications such as PowerDirector Mobile, PhotoDirector Mobile, and Power Media Player for the Windows, Android and iOS platforms. These programs are designed for media playback, editing, copying and conversion. CyberLink Corporation is a Taiwanese company that develops multimedia software products such as PowerDVD, MediaShow, Power Director, and more Cyberlink was founded in 1996 by Dr. Jau Huang, a professor at the National Taiwan University. In 2000, CyberLink became a publicly traded company, featuring on the Taiwanese stock exchange. Cyberlink is listed among the "200 Best under a Billion" companies by Forbes. It is currently headquartered in New Taipei, Taiwan.

CLMLService stands for CyberLink Media Library Service

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 CLMLService.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.

Click to Run a Free Scan for CLMLService.exe related errors

CLMLService.exe file information

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

The process known as Cyberlink MediaLibrary NT Service belongs to software Cyberlink MediaLibrary NT Service or ACD/Labs Software in by Cyberlink (

Description: CLMLService.exe is not essential for Windows and will often cause problems. The CLMLService.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 737,381 bytes (40% of all occurrences), 1,077,376 bytes, 737,379 bytes or 737,370 bytes. 
The program has no visible window. The file is not a Windows core file. The application uses ports to connect to or from a LAN or the Internet. Therefore the technical security rating is 60% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can ask for help from Support, make sure that you have installed the latest version or safely remove the program using the uninstall program of Cyberlink MediaLibrary NT Service (Control Panel ⇒ Uninstall a Program).

Recommended: Identify CLMLService.exe related errors

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

Seems to be the resident part of the Cyberlink Power cinema platform. In my case preinstalled with the OEM set of applications on a new system.
  Alexander Boelen   (further information)
It's a power cinema service or also know as DVD player
It caused massive amounts of UDP connections to be opened (observed with SysInternals' TCPView), possibly flooding my connection limit and thus causing "weird" cannot connect errors in other programs.
  Niels Huylebroeck  
It appears to be part of Cyberlink software as supplied with Mesh computers. Mesh are unable to assist regarding its habbit of grabbing the WHOLE of the CPU time. Clear it from the startup boc via msconfig.
is part of power dvd safe to remove just want update online libary
It's certainly Cyberlinks "Power Suite" if it loads at startup and you have the shortcut menu bar tower loading on your desktop it will gobble up all your processor power. If your machine is running slow check "running processes" in Win Task Manager, If CLMLservice is there you can bet its gobbling 90% of your CPU. Dump it and install a kinder program or at least dont let it start with windows.
  Steve Rickman  
Cyberlink Media Library Service
As stated by Mr. Boelen this is part of Cyberlink Power Cinema for example. It seems the port it listens to is used to look for other Cyberlink installations. Check CLMLServer.exe and CLCapSvc.exe (Capture Service for Video...), as well. You have to decide if you need this feature (Media Server streams), if not you may deactivate them via msconfig.
Niels Huylebroeck's description above rings most true. Task Manager doesn't show CPU or RAM use to be the root of the problem - it is CONNECTIONS.
Commonly part of the collection of pre-packaged OEM software deployed on laptops from companies like Gateway, HP, etc. In Windows "Startup" by default and can be disabled in MSCONFIG. Used for managing webcam, audio, video, and other media.
Eats lots of CPU during compiling
It uses a lot of system resources and internet connections but does not seem to provided any user benefit in return, probably collecting personal info and sending it back to cyberlink. It supposedly collects info on the movies you watch but does not say how this is supposed to be any benefit to you.
Resource hog. I never used it so uninstalled and use occasionally a free-ware player

Rating chart

Summary: Average user rating of CLMLService.exe: based on 18 votes with 13 user comments. 8 users think CLMLService.exe is essential for Windows or an installed application. 7 users think it's neither essential nor dangerous. 2 users suspect danger. One user thinks CLMLService.exe is dangerous and recommends removing it.

Do you have additional information?
What do you know about CLMLService.exe:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving CLMLService issues

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

CLMLService.exe [all]