What is AClient.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 AClient.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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AClient.exe file information

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

The process known as aclient belongs to software Altiris Client Agent for Windows or Altiris Client-Dienst by Altiris (

Description: AClient.exe is not essential for Windows and will often cause problems. AClient.exe is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of C:\Windows\System32. Known file sizes on Windows 8/7/XP are 1,953,868 bytes (15% of all occurrences), 5,316,684 bytes and 15 more variants. 
The AClient.exe file is not a Windows core file. The process listens for or sends data on open ports to a LAN or the Internet. The program is not visible. AClient.exe is able to record keyboard and mouse inputs, hide itself and monitor applications. Therefore the technical security rating is 45% dangerous, however you should also read the user reviews.
If you have any problems with AClient.exe, you can uninstall Eudora from your computer using the Control Panel applet "Add/Remove programs".

Recommended: Identify AClient.exe related errors

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

This file is the Altirus Client, it's used for system administration
  Digital Janitor   (further information)
This is typically installed as part of a corporate network installation to manage user's computers.
  Erik   (further information)
It gives error messages and consumes 99% of CPU usage
Many virus scanners do not recognize it as a virus because of it's 'administrative' purposes.
It's loaded on compaq computers. Look in c:\compaq
I know it's gay to the 10th power.
  m4x0r h4x0r  
This is the altiris process for deployment
Aclient.exe is Altiris Deployment Server's client side application.
  JW   (further information)
It's for Altiris Agent, a Patch Management program for system admins. Normally in corporate networks. It pushes updates to many users.
  The Saint   (further information)
Allows unauthenticated remote admin, not detected by anti-virus
my antivirus picked it up as a spyware
I seen it was consuming 99% of CPU.
  T Henderson  
It is part of the Altiris network administration package for Windows networks
  I'd rather use Linux  

Rating chart

Summary: Average user rating of AClient.exe: based on 13 votes with 14 user comments. 7 users think AClient.exe is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. 2 users suspect danger. 3 users think AClient.exe is dangerous and recommend removing it. 2 users don't grade AClient.exe ("not sure about it").

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Best practices for resolving AClient issues

A clean and tidy computer is the key requirement for avoiding problems with AClient. 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 doing a repair of your installation, or in the case of Windows 8, 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 AClient.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

AClient.exe [all]