How to remove the cmss virus

Most antivirus programs identify cmss.exe as malware—such as BitDefender identifies it as Trojan.Generic.7400924, and Kaspersky identifies it as Trojan-Downloader.Win32.Agent.gzle or Trojan-Spy.Win32.WinSpy.arq.

The cmss.exe file is a software component of ServerSpool by ServicesWireless.

CMSS stands for Content Management Server Spool winsyst32

The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.

Click to Run a Free Virus Scan for the cmss.exe malware

Cmss.exe file information

Windows Task Manager with cmss
Cmss.exe process in Windows Task Manager

The process known as winsyst32 or ProService or ElectronicDevelopments

belongs to software ServerSpool or NTResource or Event Log

by ServicesWireless or Datapoint or Event Log or Adler.

Description: Cmss.exe is not essential for Windows and will often cause problems. Cmss.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 405,504 bytes (75% of all occurrences) or 212,992 bytes. 
The cmss.exe file is a file with no information about its developer. The program has no visible window. The cmss.exe file is not a Windows core file. The software starts upon Windows startup (see Registry key: MACHINE\Run, User Shell Folders). Cmss.exe is able to record keyboard and mouse inputs, monitor applications and hide itself. Therefore the technical security rating is 56% dangerous.

Recommended: Identify cmss.exe related errors

If cmss.exe is located in a subfolder of C:\Windows, the security rating is 70% dangerous. The file size is 172,032 bytes (50% of all occurrences) or 249,856 bytes. The program is not visible. The cmss.exe file is an unknown file in the Windows folder. It is not a Windows core file. The process uses ports to connect to or from a LAN or the Internet. Cmss.exe is able to record keyboard and mouse inputs, hide itself and monitor applications.

If cmss.exe is located in a subfolder of the user's profile folder, the security rating is 82% dangerous. The file size is 335,968 bytes. The application has no file description. The program is not visible. Cmss.exe is not a Windows system file.

Important: You should check the cmss.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 cmss issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active cmss process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the cmss.exe on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. 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.

Other processes

cmss.exe [all]