▷ What is MPSigStub.exe and how to remove it?

MpSigStub.exe is a trusted Microsoft installer application that is part of the Windows Automatic Update Tool. Its function is to extract the update files to a temporary directory. Besides WU (Windows Update), Microsoft Windows Defender and Microsoft Malware also use the MpSigStub executable as an extraction tool..

Every time Automatic Update or a standalone installer is used, the update package is automatically extracted to a temporary directory (a folder with a name like 5b7ebf9872d5b93ab156a444). This is done by the MpSigStub.exe installer. After extracting the update to the temporary folder, MpSigStub.exe will perform various checks and determine if the extracted files are ready to be applied.

By default, MpSigStub.exe is located in C: / Windows / System 32, but it can also be found inside a temporary folder created by the update installer. In some cases, may discover multiple copies of MpSigStub.exe.

The confusion surrounding MpSigStub.exe

When Microsoft was preparing to launch Windows 10, MPSigStub.exe was implemented in Windows Vista, Windows 7 and Windows 8.1 with a silent update. Users were rightly suspicious as the executable had no Microsoft credentials in the Properties window. Even stranger, some users have noticed that the file was located on the second partition (not where the operating system houses) or even on an external hard drive.

To add to the confusion, the executable contains the word Stub: a stub is a file created by an encryptor that encrypts a malicious program to make it undetectable by antivirus software. Often attached to executable which is encrypted and read-only.

However, some malware is known / Trojans can disguise themselves as MPSigStub.exe and hide inside Windows C system: Windows or C: N 32. In the first weeks after its implementation, several antivirus suites such as SpyHunter were marked, McAfee and Bullguard and even MPSigStub.exe quarantined for suspicious activity related to registry change. Since then, people have legitimately reported it as a false positive in their security suites, so your antivirus shouldn't flag it unless it's really malware in disguise.

Remove MPSigStub.exe

Normally, MPSigStub.exe and the folder it created should be deleted automatically when the upgrade process is complete and MPSigStub.exe is no longer used.

It won't end up breaking your system files though, removing the MPSigStub executable is completely unnecessary in normal terms. However, there are situations where the update installer will crash and create multiple weird folders with the MPSigStub executable in each of them. Normally, those folders are created on hard drives and external media. This is only known to occur in versions of Windows prior to Windows 10.

Users who encountered the MPSigStub.exe error complained that their system would not allow them to delete folders with the executable normally. But note that even if you manage to remove MPSigStub.exe, Windows will automatically recreate the file the next time you need it.

Here is a collection of methods that will allow you to delete the MPSigStub.exe file and the folder it created. Follow the one that seems most accessible to you. Let us begin:

Note: No need to remove it unless you experience the failure of multiple instances of MPSigStub.exe. If that's the case, apply one of the following methods to each of the folders containing the MPSigStub executable. Note to delete MPSigStub.exe located in Windows / System 32 will not delete any generated folder.

Method 1: Open File Explorer (Windows Explorer) in Administrator mode

This is perhaps the easiest method of avoiding the permissions problem when you have to remove the MPSigStub executable. It involves opening the built-in file explorer with administrative privileges. Then, explains how to remove MPSigStub.exe with explorer.exe in administrator mode:

1. Click on the start bar in the lower left corner and search for explorer.exe. Right click in File Explorer and select Run as administrator.

   Note: Depending on your version of Windows, you might see explorer.exe as File Explorer or Windows Explorer.

2. UAC (User account control) it will ask if you will allow explorer.exe to make changes to the system. Select yes.

   

3. With Explorer.exe in administrator mode, navigate to the location of the folder containing MPSigStub.exe, right click on it and hit Delete. If you have administrative privileges, the process should complete successfully.

   

Method 2: change the permissions of MPSigStub.exe

The same result can be achieved by changing the permissions of the MPSigStub executable.. This may take a little longer, but it won't end up granting unnecessary permissions. This is what you have to do:

1. Navigate to the location of MPSigStub.exe, right click on it and go to Properties.

   

2. Go to the Security tab and click the Edit button to change the permissions.

   

3. In the Permissions window, select Users and make sure your account is set to active, then scroll down and check all the boxes under Permissions. Finally, press Apply to save your selection.

   

4. Now go back to the location of MPSigStub.exe and delete it normally.

Method 3: Removing MPSigStub.exe Using a Command Prompt

This method is a bit more complicated, as it involves the use of commands. However, does not require you to modify permissions or browse with administrator privileges. This is what needs to be done:

1. Press the Windows key + R to open a run window. Later, type cmd and hit Enter to open a command prompt window.

   

2. Use the command prompt to navigate to the partition where MPSigStub.exe is located. Begin by typing your drive letter followed by “:” (namely, d: o c :).

   Note: If the folder is on drive C, you will also need to write cd / and hit Enter to go back to the root location of your Windows drive.

3. Access the folder containing MPSigStub.exe by typing cd * your folder name *. If the folder has a very long name, you can type the first characters followed by an asterisk.

   

4. Delete the MPSigStub.exe file inside by typing »del MPSigStub.exe» and pressing Enter.

   

5. Return to the folder level by typing “cd ..”.

   

6. Finally, remove the generated directory by typing »rmdir * FolderName * »and press Enter.

   Note: As we did before, you can only type the first letters followed by an asterisk if the name is too long.

That's all. Folder has been deleted along with MPSigStub.exe.