What is engine.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 engine.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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Engine.exe file information

The process known as Combat Arms or Atlantic Quest belongs to software Combat Arms or Atlantic Quest by MyPlayCity or Nexon (

Description: Engine.exe is not essential for the Windows OS and causes relatively few problems. The file engine.exe is located in a subfolder of the user's profile folder. Known file sizes on Windows 10/8/7/XP are 7,916,032 bytes (60% of all occurrences), 1,201,166 bytes or 80,384 bytes. 
Engine.exe is a file with no information about its developer. The program has no visible window. The engine.exe file is not a Windows system file. Engine.exe is able to monitor applications. Therefore the technical security rating is 71% dangerous, however you should also read the user reviews.

Recommended: Identify engine.exe related errors

If engine.exe is located in a subfolder of "C:\Program Files", the security rating is 17% dangerous. The file size is 3,215,872 bytes (40% of all occurrences), 3,185,424 bytes, 3,277,144 bytes or 1,044,480 bytes. The file is not a Windows core file. Engine.exe is able to record keyboard and mouse inputs, monitor applications and manipulate other programs.

Uninstalling this variant: You can uninstall the program Atlantic Quest or A9CAD, update it, or ask Customer Support for help. Go to to update it, go to for support, or go to Atlantic Quest or A9CAD in Windows Control Panel (Software or Programs section) to uninstall it.

Important: Some malware also uses the file name engine.exe, for example PUA.Gen or Trojan.Gen.2 (detected by Symantec), and TROJ_GEN.R0E6C0EI614 or TROJ_GEN.R08OC0OKQ14 (detected by TrendMicro). Therefore, you should check the engine.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

  Pavel   (further information)
installation software
it comes up after we install games, right before the first screen comes on to play the game
engine.exe problem
protetor de tela motor montando
  jose batista de souza pinto  
It comes with installation of the game Pirates of the Carribian and you need it to play the game.
  Jan   (further information)
A Game. Combat Arms
Teil u.a. von der softwaree "free WAV to MP3"
ENGINE~1.EXE is making my CPU go to 100% usage. Ended process, deleted from Registry, Rebooted, and it came back! Need to clean registry.
This is used to run games.

Rating chart

Summary: Average user rating of engine.exe: based on 16 votes with 10 user comments. 13 users think engine.exe is essential for Windows or an installed application. One user thinks it's probably harmless. 2 users suspect danger. 3 users don't grade engine.exe ("not sure about it").

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Best practices for resolving engine issues

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

engine.exe [all]