How to remove an msimn error

The free file information forum can help you determine if msimn.exe is a virus, trojan, spyware, or adware that you can remove, or a file belonging to a Windows system or an application you can trust.

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Msimn.exe file information

The process known as Outlook Express belongs to software Microsoft Windows Operating System by Microsoft (www.microsoft.com).

Description: msimn.exe is located in a subfolder of "C:\Program Files" - generally C:\Program Files\Outlook Express\. Known file sizes on Windows 7/XP are 60,416 bytes (79% of all occurrences), 15,872 bytes and 6 more variants.
The file is a Microsoft signed file. Msimn.exe is a Windows core system file. The program has a visible window. Therefore the technical security rating is 7% dangerous, however also read the users reviews.
If you run into problems with msimn.exe, you may want to completely remove reFX Nexus (Control Panel⇒Add/Remove programs).

Recommended: Identify msimn.exe related errors

Viruses with the same file name

Is msimn.exe a virus? No, it is not. The true msimn.exe file is a safe Microsoft Windows system process, called "Outlook Express". However, writers of malware programs, such as viruses, worms, and trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are for instance Backdoor:Win32/Sdbot or Backdoor:Win32/Sdbot.ZG (detected by Microsoft), and Packed.Win32.Black.a or Backdoor.MSIL.Agent.b (detected by Kaspersky).
To ensure that no rogue msimn.exe is running on your PC, click here to run a Free Malware Scan.

How to recognize suspicious variants? If msimn.exe is located in the folder C:\Windows, the security rating is 68% dangerous. The file size is 547,840 bytes (50% of all occurrences) or 559,104 bytes. It is a file without information about the developer of this file. The process starts when Windows starts (see Registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run, HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices, HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders, HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders). The file is not a Windows core file. msimn.exe is able to hide itself and monitor applications.

If msimn.exe is located in the folder C:\Windows\System32, the security rating is 100% dangerous. The file size is 101,376 bytes. File msimn.exe is a file without information about the developer of this file. It is an unknown file in the Windows folder. The program has no visible window. The program is loaded during the Windows boot process (see Registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run, HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices, HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders, HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders). The application listens for or sends data on open ports to a LAN or the Internet. The file is not a Windows system file. msimn.exe is able to record inputs, hide itself and monitor applications.

Important: Some malware camouflages itself as msimn.exe, particularly when located in the c:\windows or c:\windows\system32 folder. Therefore, you should check the msimn.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.

Score

User Comments

File msimn.exe is the main executable for Microsoft Outlook Express, which is an email and news group client that is installed with the Windows Operating system. Be sure to always check whether you have installed the latest updates since many worm viruses are exploiting this program to infect your system

It is an extension of Outlook. Used for playing sound from your outlook e-mails.

it would not download - XP microsoft update of security patch - error#oX3F5?
Ann G.

uses 100% of my CPU capacity
Bob

caused all my user name, passwords boxes to automatically fill with -----------------------
wcwillis

part of Outlook Express
mel

Sometimes oulook express gets stuck downloading an email and closing outlook express and reopening it will not resolve the problem. You must go to webmail and deleting the offending email (for example 7 of 12) and then reopen outlook express. If it still does not resolve the problem you must reboot so it stops trying to "complete the download of the bad message". Well, the reboot is not necessary. Just go to the task manager, processes tab and "end process" the msmin.exe file. This is what is stuck. A reboot also clears it but is very time consuming.
Frank

uses 98% of my cpu
M

all I know is my outlook will not load until I shut this off on task manager
patrick

Part of Outlook Express 6
Brandon

Summary: Average user rating of msimn.exe: based on 17 votes with 10 reviews.

7 users think msimn.exe is essential for Windows or an installed application. 4 users think it's probably harmless. 1 user think it's neither essential nor dangerous. 3 users suspect danger. 2 users think msimn.exe is dangerous and recommend removing it. 1 user doesn't grade msimn.exe ("not sure about it").

Msimn scanner

Security Task Manager shows all running Windows tasks including embedded hidden functions (e.g. keyboard or browser monitoring, autostart entry). A unique security risk rating indicates the likelihood of the process being potential spyware, malware, keylogger or a Trojan.

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