What is comhost.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 comhost.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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Comhost.exe file information

Windows Task Manager with comhost
Comhost.exe process in Windows Task Manager

The process known as COM Aggregation Host or Consolewindowhost belongs to software Firewall Component or Norton Internet Security by Symantec (

Description: Comhost.exe is not essential for the Windows OS and causes relatively few problems. Comhost.exe is located in a subfolder of "C:\Program Files\Common Files". Known file sizes on Windows 10/8/7/XP are 55,640 bytes (44% of all occurrences), 49,248 bytes or 48,272 bytes. 
The service can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. It is a Verisign signed file. The file has a digital signature. It is not a Windows core file. The process can be uninstalled in the Control Panel. Therefore the technical security rating is 8% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you encounter difficulties with comhost.exe, you may also safely remove the program using the uninstall program of Norton 360 or Norton Internet Security (Control Panel ⇒ Uninstall a Program).

Recommended: Identify comhost.exe related errors

If comhost.exe is located in a subfolder of "C:\Program Files", the security rating is 70% dangerous. The file size is 901,632 bytes (50% of all occurrences) or 13,179,660 bytes. The program is not visible. It is not a Windows core file. The comhost.exe file is a file with no information about its developer. The application starts upon Windows startup (see Registry key: win.ini). Comhost.exe is able to record keyboard and mouse inputs and manipulate other programs.

If comhost.exe is located in a subfolder of the user's profile folder, the security rating is 51% dangerous. The file size is 90,112 bytes (50% of all occurrences) or 13,179,660 bytes. The process has no file description. The program has no visible window. Comhost.exe is not a Windows system file. Comhost.exe is able to record keyboard and mouse inputs.

Important: Some malware camouflages itself as comhost.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example TROJ_GEN.R02KC0EAD15 (detected by TrendMicro), and Trojan-Spy.MSIL.KeyLogger.bixy (detected by Kaspersky). Therefore, you should check the comhost.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.


User Comments

Norton 360 online datei (FIREWALL)
comhost.exe is a COM Aggregation Host and part of Norton Internet Security developed by Symantec

Summary: Average user rating of comhost.exe: based on 2 votes with 2 user comments. 2 users think comhost.exe is essential for Windows or an installed application.

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Best practices for resolving comhost issues

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

comhost.exe [all]