Disable Malicious Software Removal Tool From Installing

The Windows Malicious Software Removal Tool (MRT) is a freeware app that Microsoft redistributes via the Windows Update service. The application can also be downloaded separately from Microsoft's website. This tool is known to take a long time to complete scans and consumes system resources during those scans, so you might want to prevent Windows 10 from installing it. Here is how.

Msrt Mrt There is a Registry tweak which prevents Microsoft Malicious Software Removal Tool from being offered on Windows Update and getting installed to C:\Windows\system32\mrt.exe. Once you apply the Registry tweak, the application won't be offered via Windows Update so it should not even get downloaded.

To Disable Microsoft Malicious Software Removal Tool From Installing, do the following.

  1. Open Registry Editor.
  2. Go to the following Registry key:
    HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\MRT

    If you do not have this Registry key, then just create it. The MRT key might be missing. Msrt Create New Key
    Tip: How to jump to the desired registry key with one click.

  3. Then, create a new 32-bit DWORD value named DontOfferThroughWUAU. Set its value data to 1. Disable Malicious Software Removal Tool From Installing
    Note: Even if you are running a 64-bit Windows version, you still need to create the 32-bit DWORD value.
  4. Restart Windows 10.

You can save your time and download ready-to-use Registry files. The undo tweak is included.

Download Registry Files

If you had Microsoft Malicious Software Removal Tool installed in Windows 10, you can easily uninstall it now.

Open an elevated command prompt and run the following command:

wusa /uninstall /kb:890830 /quiet /norestart

You can save your time and use Winaero Tweaker instead. It comes with the following feature:

Winaero Tweaker Disable Mrt

You can download it here: Download Winaero Tweaker.

That's it.

6 thoughts on “Disable Malicious Software Removal Tool From Installing

  1. MDJ

    ‘This tool is known to take a long time to complete scans and consumes system resources during those scans’
    It does take a long time to scan and it may consume some of valuable computer resources but only if you manually launch it and perform full scan. I believe that after Windows updating itself it probably just quickly scans the computer and turns off until new version is installed so therefore I’ve never noticed a performance decrease.

    Reply
  2. Shyam

    Thanks Sergey! Just did it.

    Reply
  3. throkr

    About the ready-to-use registry files : both are identical. Shouldn’t the value for the undo key be set to “0” ?

    Reply
    1. Sergey Tkachenko Post author

      yep you are right.
      sorry

      Reply
      1. Sergey Tkachenko Post author

        I reuploaded the file.

        Reply
        1. throkr

          Thank you !

          Reply

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