What is accrdsub.exe?

The genuine accrdsub.exe file is a software component of ActivClient by ActivIdentity.
Accrdsub.exe is an executable file that belongs to ActivClient, a desktop authentication software that works with smart cards, readers, operating systems, networks and enterprise applications. This is not a critical Windows component and should be removed if known to cause problems. ActivClient software enables the enforcement of company guidelines and policies while accessing networks and workstations. The program features storage for multiple credentials using the public key infrastructure (PKI); one-time password (OTP) and static passwords on a single authentication device; remote access solutions; PIN management; notifications and logging. ActivIdentity is an American company based in Silicon Valley, California that develops digital identity assurance solutions including authentication and smart card services for enterprise, government and commercial establishments. The company was founded in 1987 and acquired by HID Global in 2010.

Accrdsub stands for ActivIdentity card event subhandler

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 accrdsub.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 accrdsub.exe related errors

Accrdsub.exe file information

Windows Task Manager with accrdsub
Accrdsub.exe process in Windows Task Manager

The process known as ActivIdentity card event handler belongs to software ActivClient (version 6.1 x86, x86) or ActivClient CAC (version 6.1 x86, 6.1 AFR) or ActivClient for CAC - PKI Only or ActivClient Mini or SAMSUNG USB Driver for Mobile by ActivIdentity (

Description: Accrdsub.exe is not essential for the Windows OS and causes relatively few problems. The file accrdsub.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 293,168 bytes (46% of all occurrences), 400,936 bytes and 6 more variants. 
The program is not visible. The process starts when Windows starts (see Registry key: MACHINE\Run). It is not a Windows core file. Accrdsub.exe is a Verisign signed file. The file has a digital signature. The software can be uninstalled in the Control Panel. Therefore the technical security rating is 27% dangerous; however you should also read the user reviews.

Uninstalling this variant: If any problems with ActivClient 6.1 x86 or ActivClient x86 occur, you may also want to uninstall it software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7) or turn to the software company, Actividentity, for advice.

Recommended: Identify accrdsub.exe related errors

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

accrdsub.exe is a process from ActivIdentity card event handler by ActivIdentity and part of ActivClient.

Summary: Average user rating of accrdsub.exe: based on 1 vote with 1 user comment. One user thinks it's probably harmless.

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Best practices for resolving accrdsub issues

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

accrdsub.exe [all]