What is acevents.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 acevents.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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Acevents.exe file information

Windows Task Manager with acevents
Acevents.exe process in Windows Task Manager

The process known as ActivIdentity Event Service belongs to software ActivClient Services or ActivClient for CAC - PKI Only or ActivClient Mini or ActivClient CAC (version 6.1 x86) or ActivClient (version x86 NASA DSI) by ActivIdentity (

Description: Acevents.exe is not essential for Windows and will often cause problems. Acevents.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 8/7/XP are 95,024 bytes (30% of all occurrences), 153,640 bytes and 6 more variants. 
The program has no visible window. It is not a Windows core file. The software can be uninstalled in the Control Panel. It is a Verisign signed file. The file is digitally signed. Therefore the technical security rating is 18% dangerous, however you should also read the user reviews.
It is possible to visit the website or uninstall the program using the Control Panel ⇒ Add/Remove programs ⇒ ActivClient x86 or ActivClient 6.1 x86.

Recommended: Identify acevents.exe related errors

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

There is a small bar with this name "ace vents" on my screen and i can't remove it. Your scans are not compatible with vist 64 bit.
acevents.exe - ActivCard / ActivIdentity. Belongs to ActivIdentity software. ActivIdentity® solutions include Smart Employee ID, Enterprise Single Sign On, Strong Authentication, Secure Information and Transactions, and Smart Citizen ID. ActivIdentity products include SecureLogin® SSO, ActivClient™ smart card middleware, ActivID™ Card Management System, 4TRESS™ AAA Server, one-time password (OTP) tokens, and ActivKey™ USB tokens.
  Larry   (further information)
Likely supports CAC cards

Summary: Average user rating of acevents.exe: based on 5 votes with 3 user comments. One user thinks acevents.exe is essential for Windows or an installed application. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. 2 users think acevents.exe is dangerous and recommend removing it.

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Best practices for resolving acevents issues

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

acevents.exe [all]