Is It Possible to Block All "Malicious Software Removal Tool" Updates?

Yes you can block any update you want with Windows Automatic Update Manager.

Option 7

Enable or Disable Windows Update Automatic Updates in Windows 10 | Tutorials (tenforums.com)

I have never ever had to use that tool.

Malicious Software Removal Tool in Windows | Tutorials (tenforums.com)

spaceman5 said:

Is it possible to Block all "Malicious Software Removal Tool" updates from being downloaded and installed when doing Windows Update?

Yes. You can disable its updates. I have done so on several computers without any side-effects.
Disable Malicious Software Removal Tool From Installing - WinAero
Do note that this article also describes how you can uninstall MRT as well.

The tool itself remains on the computer unless you run the uninstall procedure [C:\Windows\System32\MRT.exe & C:\Windows\System32\MRT-KB890830.exe] but it never does anything unless you deliberately run it so disabling its updates is sufficient.

My MRT files are 2018/2019 versions, reflecting when I disabled their updates.
- I don't mind their existence but I've just this moment deleted them anyway & I then repeated the uninstall procedure when I remembered about it.
- I assume that a 2018/9 Version update put them back on the computer but I had not noticed them at all until I was checking whilst writing this post.

There are also two .dll files in the same folder that I have not removed & the uninstall procedure also leaves them alone. They are .Net dlls and I do not know if they are related to MRT or not.
mrt_map.dll
mrt100.dll


Denis

Hello @spaceman5,

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@FreeBooters BAT Script is one that I have used and is an excellent All-In-One option that allows you to Disable or Allow the Malicious Software Removal Tool From Installing, all from ONE file.

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I use the Winaero REG File because it is easier for me as I run a Post-Installation Script whenever I need to.

Here are the two Winaero REG Files as when I just tried to look on their site it was taking forever to load [ probably my end ], so I thought that I would post them for you . . .


Disable Malicious Software Removal Tool From Installing

Code:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\MRT]
"DontOfferThroughWUAU"=dword:00000001

Undo Disable Malicious Software Removal Tool From Installing

Code:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\MRT]
"DontOfferThroughWUAU"=-

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I hope this helps.

The WinAero article also describes uninstalling MRT.
[I've just altered my first post to reflect this]

All the best,
Denis

spaceman5 said:

Thank you very much to all of you, so glad to get rid of this tool.

You are VERY welcome.

VERY <-- This looks like a Sticker printed with a Dymo Label Printer.. :)



I have this one:
Amazon.com

I really like it.
Definitely worth the 40$ it costs.