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What does the MpCmdRun.exe file do?

The MpCmdRun.exe process is also known as Microsoft Malware Protection Command Line Utility or, as the case may be, Windows Defender Command Line Utility and is a part of Microsoft Malware Protection or, as the case may be, Microsoft Windows Operating System. This software is produced by Microsoft (www.microsoft.com). An obsolete or defective version of MpCmdRun.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 MpCmdRun.exe MpCmdRun.exe

MpCmdRun.exe is not a Windows system file and is known to frequently cause computer problems. MpCmdRun.exe is found in a subdirectory of "C:\Program Files". Frequently occurring are file sizes such as 203,312 bytes (21% of all these files), 203,800 bytes as well as 23 other variants.
The program executes in the background, and can only be terminated using Windows Task Manager. This file has a digital signature. This confirms that the producer has been registered with a certificate authority. The file was developed by a so-called third party provider - and not by Microsoft. To remove the file and its related software from your computer, click Programs in Control Panel For this reason, 21% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

A MpCmdRun.exe file has a 16% certainty of being dangerous if it is found in a subdirectory of C:\Windows. In this case, the file size is usually 157,184 bytes. MpCmdRun.exe contains Microsoft's digital signature. This confirms its authenticity. This MpCmdRun.exe process does not have a visible window, and does not appear on the taskbar. It does not come from Microsoft and is not part of the operating system.

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 MpCmdRun.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 MpCmdRun?

Calls itself "Windows Defender Command Line Utility" is m$ signed and resides in the defender directory. I have no idea though why it is running all the time, never started it, and only recently it was there (maybe after latest vista service pack?)
Microsoft Security Essentials (further information...)
Windows Defender
It is not really neseccary and i dont know why it connected every few minutes to the internet: http://www.addictivetips.com/windows-tips/command-line-utility-mpcmdrun-exe-microsoft-security-essentials/
Wolfgang S.

Summary: One user judges MpCmdRun.exe to be an essential file that should not be touched. One user considers it harmless. source: file.net

How to uninstall Microsoft Malware Protection or the program

MpCmdRun.exe MpCmdRun.exe fix

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

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for Microsoft Malware Protection or the program in the list of available programs.
  5. Click Uninstall.

How to tell if MpCmdRun.exe (MpCmdRun.exe) 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 MpCmdRun.exe. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for MpCmdRun.exe 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 MpCmdRun.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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