How to remove the cmstp virus

Most antivirus programs identify cmstp.exe as malware—for instance Microsoft identifies it as Trojan:Win32/Malat or Trojan:Win32/Rodecap.A, and TrendMicro identifies it as TROJ_COSMU.A or TROJ_HORST.SMPE.

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 cmstp.exe malware

Cmstp.exe file information

The process known as Microsoft Connection Manager Profile Installer appears to belong to software Microsoft® Connection Manager by Microsoft (

Description: Cmstp.exe is not essential for Windows and will often cause problems. The file cmstp.exe is located in the C:\Windows folder. Known file sizes on Windows 10/8/7/XP are 81,920 bytes (80% of all occurrences) or 356,864 bytes. 
The file is a file with no information about its developer. The program is not visible. The cmstp.exe file is not a Windows core file. The file is an unknown file in the Windows folder. The process starts when Windows starts (see Registry key: win.ini). Therefore the technical security rating is 76% dangerous.

Recommended: Identify cmstp.exe related errors

Important: You should check the cmstp.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 cmstp issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active cmstp process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the cmstp.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

cmstp.exe [all]