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What does the msimn.exe file do?

The msimn.exe process is also known as Outlook Express and is a part of Microsoft Windows Operating System. This software is produced by Microsoft (www.microsoft.com). An obsolete or defective version of msimn.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about msimn.exe Outlook Express

The original msimn.exe file is definitely a Windows system file, but many viruses use the same name in order to remain unnoticed. Msimn.exe is found in a subdirectory of "C:\Program Files". Frequently occurring are file sizes such as 60,416 bytes (75% of all these files) or, as the case may be, 320,512 bytes.
The msimn file is part of the operating system. It contains Microsoft's digital signature. This confirms its authenticity. For this reason, 0% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves msimn.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about msimn?

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

Summary: 6 users judge msimn.exe to be an essential file that should not be touched. 4 users consider it harmless. However, 3 users consider this to be a suspicious process and would like to get rid of it. For this reason, 2 users have already deleted msimn.exe. source: file.net

How to uninstall the program

To remove Outlook Express from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. You find it in the lower left corner of the taskbar.
  2. Type the word uninstall.
  3. Click Add or remove programs.
  4. Now locate the program in the list of displayed applications.
  5. Click the program, and then click Uninstall.
Remove software in Windows 10
msimn.exe Outlook Express fix

How to tell if msimn.exe (Outlook Express) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of Outlook Express. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for Outlook Express or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or msimn.exe is causing problems for you, a good Windows diagnostic tool may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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