What is CmdLineExt03.dll?

CmdLineExt03.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if CmdLineExt03.dll is a Windows system file or if it belongs to an application that you can trust.

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CmdLineExt03.dll file information

The process CmdLineExt03.dll contains no information about its author.

Description: CmdLineExt03.dll is not essential for Windows and will often cause problems. The file CmdLineExt03.dll is located in the C:\Windows\System32 folder or sometimes in a subfolder of C:\Windows. The file size on Windows 10/8/7/XP is 43,520 bytes. 
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. There is no information about the author of the file. The program has no visible window. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. CmdLineExt03.dll is not a Windows system file. CmdLineExt03.dll appears to be a compressed file. Therefore the technical security rating is 82% dangerous, however you should also read the user reviews.

Recommended: Identify CmdLineExt03.dll related errors

Important: Some malware also uses the file name CmdLineExt03.dll, for example TROJ_AGENT.AJU (detected by TrendMicro), and Trojan Horse (detected by Symantec). Therefore, you should check the CmdLineExt03.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.


User Comments

Ok Ok the bottom line is: its safe it gets created when many atari and other games are launched...then ofcoarse the antivirus picks it up as a trojen because its screwing around with settings to copyright protect the all try and ignore it if you can but if its stopping the game from exucuting you may have to make some exeptions. but the bright side is your antivirus is doing its work
Once it is in your computer , it wont leave and keeps returning and giving you Massive Lag when playing games , i have found this to be so in playing Battlefield 2 bad company and EA games should be ashamed to Associate its self to a program that hacks into your game on your computer
  bob a job  
c:\windows\system32\CmdLineExt03.dll - i play RCT3 RRT3 and diablo i have this file and my games dont work unless i allow - combofix shows it and install date same date i installed these games
It is not a malware. A part of SecuROM copy protection system.
  Nomad Soul   (further information)
Showed up unexpectedly, noticed sever system lag and slowdowns. Was detected as a potential threat.
  Random Person #19875197826750125.1  
Lavasoft Adaware flagged this one to me, but it just comes with any games protected by SecuROM copy protection.
This file is associated with STM, SecuROM, game apps and a few other apps. Overall it is harmless at least for me. I do not recommend deleting it and by all means stop jumping at ever little instance of what most AV apps and other apps such as STM list as a possible threat. The keyword is POSSIBLE. IF you run games with secuROM it will only reload the file to run or it may crash until you reinstall. I have not seen a virus running this ever.
It's part of the copyright protection module known as SecuROM. It's completely harmless.
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of CmdLineExt03.dll: based on 74 votes with 9 reviews. 13 users think CmdLineExt03.dll is essential for Windows or an installed application. 5 users think it's probably harmless. 23 users think it's neither essential nor dangerous. 11 users suspect danger. 22 users think CmdLineExt03.dll is dangerous and recommend removing it. 10 users don't grade CmdLineExt03.dll ("not sure about it").

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Best practices for resolving CmdLineExt03 issues

A clean and tidy computer is the key requirement for avoiding problems with CmdLineExt03. 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 CmdLineExt03.dll 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

CmdLineExt03.dll [all]