What is icacls.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 icacls.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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Icacls.exe file information

The process known as icacls.exe belongs to software Red AdBlocker or Betriebssystem Microsoft Windows by Microsoft (

Description: Icacls.exe is not essential for Windows and will often cause problems. The icacls.exe file is located in a subfolder of the user's profile folder. Known file sizes on Windows 10/8/7/XP are 134,656 bytes (66% of all occurrences) or 132,096 bytes. 
It is a file with no information about its developer. The program is not visible. Icacls.exe is not a Windows system file. The application is loaded during the Windows boot process (see Registry key: User Shell Folders, Run, RunOnce). Icacls.exe is able to monitor applications. Therefore the technical security rating is 71% dangerous, however you should also read the user reviews.

Uninstalling this variant: If there are any problems with icacls.exe, you can also uninstall the associated program (Start > Control Panel > Uninstall a Program > Red AdBlocker).

Recommended: Identify icacls.exe related errors

Important: Some malware also uses the file name icacls.exe, for example Trojan.Win32.Agent.ahhce or Trojan.Win32.Agent.ajfpf (detected by Kaspersky), and Trojan Horse or Trojan.Gen (detected by Symantec). Therefore, you should check the icacls.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 is a Microsoft Windows system utility
This information in this article is incorrect. This IS a Windows system file. Information regarding this can be found on the Microsoft Technet site.
  Paull   (further information)

Summary: Average user rating of icacls.exe: based on 5 votes with 2 user comments. 2 users think icacls.exe is essential for Windows or an installed application. One user thinks it's probably harmless. 2 users suspect danger.

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Best practices for resolving icacls issues

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

icacls.exe [all]