What is aetcrss1.exe?

The genuine aetcrss1.exe file is a software component of AET Security Certificates by A.E.T. Europe B.V.
Aetcrss1.exe is an executable file that belongs to AET Security Certificates such as SafeSign, AETSign, AETeSign, StarSign Token, RaakSign. This is not a critical Windows component and should be removed if known to cause problems. AET Security Certificates are used as middleware products for authentication, integration and compatibility when dealing with card operating systems, smart cards, USB tokens, languages and functions. The technology currently supports over 200 different types of smart cards and USB tokens used on the products of NXP, G&D, Siemens, Oberthur, Gemalto and many other companies. AETEurope B.V. is a Dutch company that develops software and specializes in developing solutions for IT security and the deployment and use of secure elements and certificates. The company was founded in 1998 and is currently headquartered in Arnhem, in the Netherlands.

AETCrSS1 stands for AET Certificate SafeSign Expiration Check Utility (version 1.0)

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 aetcrss1.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 aetcrss1.exe related errors

Aetcrss1.exe file information

Windows Task Manager with aetcrss1
Aetcrss1.exe process in Windows Task Manager

The process known as Certificate Expiration Check Utility belongs to software SafeSign, AETSign, AETeSign, StarSign Token, RaakSign by A.E.T. Europe B.V (

Description: Aetcrss1.exe is not essential for the Windows OS and causes relatively few problems. The file aetcrss1.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 151,552 bytes (40% of all occurrences), 40,960 bytes, 204,800 bytes or 28,672 bytes. 
The program is not visible. It is not a Windows core file. The process is loaded during the Windows boot process (see Registry key: MACHINE\Run). Aetcrss1.exe is able to monitor applications. Therefore the technical security rating is 45% dangerous.

Uninstalling this variant: The software vendor offers the option to uninstall the software SafeSign using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program) or ask the developer,, for support.

Recommended: Identify aetcrss1.exe related errors

Important: Some malware disguises itself as aetcrss1.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the aetcrss1.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.


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Best practices for resolving aetcrss1 issues

A clean and tidy computer is the key requirement for avoiding problems with aetcrss1. 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 aetcrss1.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

aetcrss1.exe [all]