What is accvssvc.exe?

The genuine accvssvc.exe file is a software component of AccSys Client Software by AccSys GmbH.
Accvssvc.exe is an executable file that belongs to the AccSys Client Software, a network connection manager. This is not a critical Windows component and should be removed if known to cause problems. The AccSys Client Software is used to connect AccSys hardware to the Internet via DSL, ISDN, mobile phone networks and other methods. The software is used by many German Internet Service Providers in their back-end systems for mobile and stationary Internet access. AccSys GmbH is a German company that designs and develops back-end technology and security solutions for Internet access, test systems for hardware and communication protocols. The company also provides consulting services for Internet technology. AccSys is based in Munich, Germany.

AccVSSvc stands for AccSys Virtual Server Service

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 accvssvc.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 accvssvc.exe related errors

Accvssvc.exe file information

Windows Task Manager with accvssvc
Accvssvc.exe process in Windows Task Manager

The process known as AccSys WLAN Control Service belongs to software AccSys WLAN Service Control by AccSys GmbH (

Description: Accvssvc.exe is not essential for the Windows OS and causes relatively few problems. Accvssvc.exe is located in a subfolder of "C:\Program Files\Common Files". Known file sizes on Windows 10/8/7/XP are 126,976 bytes (50% of all occurrences), 131,072 bytes or 136,760 bytes. 
The program has no visible window. The file is not a Windows core file. Therefore the technical security rating is 46% dangerous.

Uninstalling this variant: If you encounter difficulties with accvssvc.exe, you can remove the entire program o2 Connection Manager using Windows Control Panel.

Recommended: Identify accvssvc.exe related errors

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

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

accvssvc.exe [all]