What is McChHost.exe?

The genuine McChHost.exe file is a software component of McAfee SiteAdvisor by McAfee.
McAfee SiteAdvisor is web service for determining the safety and validity of online websites and services. McChHost.exe is part of the chrome extension for McAfee SiteAdvisor. This is not a core Windows application and may be uninstalled if known to cause problems.

McAfee SiteAdvisor is a cross-platform application that reports on the safety of web sites through a web crawler that scans the web and gathers information on websites which may present the possibility of phishing, viruses, malware, and other harmful behavior. The program provides a browser plug-in that rates links found in email and instant messenger chats. The program has faced some criticism regarding incorrect identification of trustworthy websites.

McAfee, Inc. is an American company that develops solutions in computer software security. It is the world's largest company that is dedicated entirely to the development and distribution of security software. The company was founded in 1987 by John McAfee as McAfee Associates. Intel acquired McAfee on February 28, 2011 for $7.68 billion. In 2017, Intel turned the company into a standalone enterprise but continues to own a 49% stake. McAfee is currently headquartered in Santa Clara, California, USA.

McChHost stands for McAfee SiteAdvisor Chrome Host

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 McChHost.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 McChHost.exe related errors

McChHost.exe file information

Windows Task Manager with McChHost
McChHost.exe process in Windows Task Manager

The process known as SiteAdvisor belongs to software McAfee WebAdvisor or McAfee SiteAdvisor by McAfee (

Description: McChHost.exe is not essential for the Windows OS and causes relatively few problems. McChHost.exe is located in a subfolder of "C:\Program Files (x86)"—for instance C:\Program Files (x86)\McAfee\SiteAdvisor\. Known file sizes on Windows 10/8/7/XP are 642,344 bytes (22% of all occurrences), 488,520 bytes and 6 more variants. 
The program has no visible window. It is a Verisign signed file. The file is digitally signed. It is not a Windows core file. Therefore the technical security rating is 6% dangerous.

Uninstalling this variant: It is possible to visit the website or uninstall the program using the Control Panel ⇒ Uninstall a ProgramMcAfee WebAdvisor or McAfee SiteAdvisor.

Recommended: Identify McChHost.exe related errors

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

There are no user opinions yet. Why not be the first to write a short comment?

Do you have additional information? Help other users!

Best practices for resolving McChHost issues

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

McChHost.exe [all]