What is MpMiniSigStub.exe?

The genuine MpMiniSigStub.exe file is a software component of Microsoft Antimalware Signatures Updating by Microsoft Corporation.
"MpMiniSigStub.exe" is a small, harmless Microsoft file, (usually 14KB-32KB), often left behind after installing updates to anti-malware signature definition files used by Microsoft Security Essentials or Windows Defender. It is always in a temporary folder with a seemingly random name at a disk volume's root level, (e.g., "C:\95197bf9f9fac5d992714d80b2d5\MpMiniSigStub.exe"). If multiple volumes exist, the volume with the greatest percentage, not the greatest amount, of free space contains these folders which can only be deleted by an administrator account. Its function is not discussed in Microsoft blogs or forums but its name resembles "MpSigStub.exe", used to execute downloaded signature definition "delta update" (vs. "full update") files. Microsoft, which grew from its two co-founders in April 1975, Paul Allen and Bill Gates, to become the world's largest software company by revenue in 2016, introduced Windows NT (XP and later) in 2001, involving radically new "side-by-side assembly" and updating principles.

MpMiniSigStub stands for Microsoft Antimalware Signature Redirector

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 MpMiniSigStub.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.

Click to Run a Free Scan for MpMiniSigStub.exe related errors

MpMiniSigStub.exe file information

Windows Task Manager with MpMiniSigStub
MpMiniSigStub.exe process in Windows Task Manager

The MpMiniSigStub.exe process does provide any valid information about its producer.

Description: MpMiniSigStub.exe is not essential for the Windows OS and causes relatively few problems. The MpMiniSigStub.exe file is located in a not clearly defined folder. The file size on Windows 10/8/7/XP is 0 bytes. 
The application has no file description. Note: File does not exist any longer. The program has no visible window. The MpMiniSigStub.exe file is not a Windows system file. Therefore the technical security rating is 42% dangerous.

Recommended: Identify MpMiniSigStub.exe related errors

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

One user thinks MpMiniSigStub.exe is essential for Windows or an installed application. One user thinks MpMiniSigStub.exe is dangerous and recommends removing it.

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Best practices for resolving MpMiniSigStub issues

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

MpMiniSigStub.exe [all]