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.

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

Icacls.exe file information

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

Description: The original icacls.exe from Microsoft is an important part of Windows, but often causes problems. The icacls.exe file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 30,208 bytes (66% of all occurrences) or 27,136 bytes. 
It is a Windows system file. There is no description of the program. Icacls.exe is a trustworthy file from Microsoft. The program has no visible window. Therefore the technical security rating is 8% dangerous, however you should also read the user reviews.

Recommended: Identify icacls.exe related errors

Viruses with the same file name

Is icacls.exe a virus? No, it is not. The true icacls.exe file is a safe Microsoft Windows system process, called "icacls". However, writers of malware programs, such as viruses, worms, and Trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are e.g. Trojan.Win32.Agent.ajfpf or Trojan.Win32.Agent.alooh (detected by Kaspersky), and Trojan Horse or Trojan.Gen (detected by Symantec).
To ensure that no rogue icacls.exe is running on your PC, click here to run a Free Malware Scan.

How to recognize suspicious variants?

Important: Some malware disguises itself as icacls.exe, particularly when not located in the C:\Windows\System32 folder. 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 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 icacls.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

icacls.exe [all]