What is muachost.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 muachost.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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Muachost.exe file information

Windows Task Manager with muachost
Muachost.exe process in Windows Task Manager

The process known as Windows Host Process belongs to software muachost by MSI (

Description: Muachost.exe is not essential for Windows and will often cause problems. Muachost.exe is located in a subfolder of C:\Windows or sometimes in the C:\Windows\System32 folder—in most cases C:\Windows\SysWOW64\. The file size on Windows 10/8/7/XP is 1,692,840 bytes. 
The program has no visible window. Muachost.exe is certified by a trustworthy company. The file is not a Windows core file. Muachost.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 43% dangerous; but you should also compare this rating with the user reviews.

Recommended: Identify muachost.exe related errors

Important: Some malware camouflages itself as muachost.exe. Therefore, you should check the muachost.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

It's a file from MSI, better known for their motherboards and graphics cards. This file was installed when I installed MSI's Afterburner. Which is a graphis card monitor, overclocker, utility tool, giving a person pretty much almost absolute control over their graphics cards performance.
  Keith Breen   (further information)
This comes with the when i installed MSI GAMING APP.
Datei hat folgende Hashwerte CRC32: 14568B24 MD5: B9966F800D2A3A1522B1825077785C40 SHA-1: 6F463EFE305D9816406F8F7B432C89D919E6DEA5 aus der Registry (runonce?):HKCU\SOFTWARE\Microsoft\ Windows\CurrentVersion\RunOnce Ich habe NVIDIA GeForce GTX 1070 mit programmen installiert aber das Programm ist mir noch nie aufgefallen. Beim Start unter Win10Home öffnet sich bei mir ab und zu ein Command"-Fenster ohne das ich die Startrampe finde auf der Suche danach bin ich über die Datei gestolpert die kein separates Icon hat. Ihre Seite ist Top!!!
  Hubert Sterle  

Summary: Average user rating of muachost.exe: based on 3 votes with 3 user comments. 3 users think it's neither essential nor dangerous.

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Best practices for resolving muachost issues

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

muachost.exe [all]