What is cgserver.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 cgserver.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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Cgserver.exe file information

The process known as ISDN Security Daemon belongs to software Diva Assistant or ISDN Security Daemon by Eicon Networks (

Description: Cgserver.exe is not essential for the Windows OS and causes relatively few problems. The cgserver.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 40,960 bytes (75% of all occurrences) or 45,056 bytes. 
The program has no visible window. The process starts upon Windows startup (see Registry key: MACHINE\Run). The cgserver.exe file is not a Windows system file. The software can be uninstalled in the Control Panel. Therefore the technical security rating is 38% dangerous.

Uninstalling this variant: If there are any problems with cgserver.exe, you may want to uninstall Diva Assistant software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7).

Recommended: Identify cgserver.exe related errors

External information from Paul Collins:

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

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

cgserver.exe [all]