Welcome to the PC Pitstop Process Library. We have an extensive list of the most common processes currently running on PCs. Use this library to inspect the safety of your running processes on a regular basis.

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Process Name

  

Unknown Unknown
Safe Safe
User Optional User Optional
Unwanted Unwanted
Spyware / Adware Spyware / Adware
Virus Virus


msimn.exe (Outlook Express)

Percentage of recently scanned PC's with this process running: 0.36%
Average CPU use for this program: 0%
Average RAM for this program: 14 MB


In addition to the file name, msimn.exe, the following version information is used to identify the file. If the file does not match this information, it may be a different file. To ensure the file is absolutely correct, run a free and comprehensive scan.

Vendor contains:Microsoft
Product contains:Windows

To view version information with Windows Explorer, right-click the file and click Properties, Version.




Win Patrol

msimn.exe is an Internet mail and news application. We advise that you not run Outlook Express while testing, it can interfere with performance measurements.

msimn.exe  is a user invoked program and a normal part of PC operations. No action required.

PC Pitstop recommends WinPatrol Plus for monitoring all of the background activity on your PC. WinPatrol Plus provides an easy to understand descriptions of over 15,000 processes and programs.


MD5 hashes is the way that computers can define the uniqueness of a file. Anti malware vendors frequently use this technique to detect and clean malware. It is common for a program to have multiple MD5 hashes as the developers create newer versions of the program. For the program called msimn.exe, we have detected more than 10 different MD5 hashes. Click on a hash to research the hash in Google.

Program Name MD5 Count
msimn.exe> 10
MD5 Hashes
# MD5 Size
1 0xfaf4250eca766e9194deadca12e69734 60928 bytes
2 0xea1e3a955674744cf10d1799cb792735 82432 bytes
3 0x635fac4b9ace6a705f223c900ff5ef40 60928 bytes
4 0xc05b3b02c1c5618cdaea63790802cc68 56832 bytes
5 0xeb457978dc5a47d897d8b2fbb0f78ce2 42768 bytes
MD5 Hashes
# MD5 Size
6 0x8ea10f7dece44cd27e44202cf15c05a6 60416 bytes
7 0x0acf23fde88e9d06c0b80d4429765709 59904 bytes
8 0x814a71be7678293b6a11968bbd36ea3c 124416 bytes
9 0xa203bd6b1ccef27175aeb575c23127b6 52736 bytes
10 0xa0445a1c119779c07e3396e37f4436e7 57344 bytes


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PC Pitstop is the undisputed leader in PC diagnostics. Our running process library is culled from our database of over 100 million PC diagnostics and scans.

To find the latest driver for your computer we recommend running our Free Driver Scan.

Find out how to make your computer faster by running our Free Performance Scan.

Tips from the PitCrew

Tips from the Pit Crew

Every process running on your computer takes up CPU cycles and valuable memory. For optimal PC performance and resource utilization, you should be aware of every process on your computer. PC Pitstop designed this process library to help you know which processes are worthwhile and others that slow system performance.

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Important Note

A file name alone may not be enough for positive identification. PC Pitstop's Overdrive tests and spyware scan use information such as the company name, product name, or install directory.

If you are unable to identify a file, ask about it in our forums after running our full tests.