Some people have reported receiving the following error message when trying to launch MRT – “This app has been blocked by your system administrator. Contact your system administrator for more info”. You can go to MiniTool to find the methods.

Malicious Removal Tool (MRT) is a freely distributed malware removal tool, which is developed by Microsoft and used on Windows operating systems. Instead of leveraging real-time protection, it focuses on scanning malware on your computer.

There are several reasons for the “MRT blocked by system administrator” error:

1. The software may be listed in the Software Restriction Policy.

2. Some registry entries prevent the tool from starting.

3. The file may not be owned by the administrator

4. Sometimes, the file doesn’t have administrator permissions.

How to Fix MRT Blocked by System Administrator?

Next, I will introduce how to fix MRT blocked by system administrator.

Method 1: Use Registry Editor

The problem can be resolved by removing MRT from the problematic list with Registry Editor. Here are the steps:

Tip: I recommend you backup your registry in advance to prevent other problems since you are going to delete a registry key.

Step 1: Press the Windows key + R key combination to open the Run dialog box, then type regedit open the Registry Editor.

Step 2: Navigate to the following key in your registry:


Step 3: Click this key and locate MRT or Malicious Removal Tool key. Right-click it, and choose the Delete option.

Step 4: Finally, navigate to the path in the registry located below and find the key named something along the lines of MRT. Right-click it and choose Delete.

HKEY_CURRENT_USER \ SOFTWARE \ Policies \ Microsoft \ Windows

Then exit Registry Editor, restart your computer and check to see whether this app has been blocked by your system. If yes, try the next method.

Method 2: Delete Certain Registry Entries

You can delete the following registry entries using Command Prompt to avoid having to locate them all manually.

Step 1: Type cmd in the search box. Right-click the first result and select the Run as administrator option.

type cmd in the search box

Step 2: Copy and paste the command shown below and press the Enter key.

reg delete "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun" /f

reg delete "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun" /f

reg delete "HKU\S-1-5-18\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun" /f

reg delete "HKU\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun" /f

reg delete "HKU\S-1-5-20\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun" /f

Then restart your computer to apply the changes. Check whether the MRT blocked by system administrator error still appears!

Method 3: Add Permissions for the Administrator Account

The second method is to add permissions for the administrator account. Here is the tutorial:

Step 1: Open your Libraries entry on your PC and click This PC option from the left side menu.

Step 2: Navigate to the mrt.exe file.

Step 3: Then right-click the mrt.exe file, click Properties, and then click Security. Click the Advanced button to open the Advanced Security Settings window.

Step 4: Click the Change link next to the Owner label.

Step 5: Check the Replace owner on subcontainers and objects box in the Advanced Security Settings window. Click OK to change the ownership.

check the Replace owner on subcontainers and objects box

Restart your computer and the problem should be resolved.

Method 4: Run MRT as an Administrator

If all of the methods above don’t work, you can try forcing MRT to run with administrator permissions.

Step 1: Locate the mrt.exe file by right-clicking its entryon the Desktop window and choose Properties.

Step 2: Navigate to the Compatibility tab and check the Run this program as an administrator option before applying the changes.

Step 3: Make sure you confirm any dialogs which may appear for you to confirm with admin privileges and MSI Gaming App should launch with admin privileges from now on.

Then try to see if the error still appears.

Final Words

To sum up, this post has introduced 4 methods to fix the “MRT blocked by system administrator” error. The error may occur when you are open the file or the program. If you encounter the same error, try these solutions.

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