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The version you have will vary depending on your processor and OS type. It comes in two forms: Windows Malicious Software Removal Tool 64-bit, and Windows Malicious Software Removal Tool 32-bit. It receives updates quarterly and automatically runs once per month. It only removes a concise list of the most prevalent malicious software and is designed to do so while the malware is active. The Microsoft Malicious Software Removal Tool, then, is more targeted. The Microsoft Malware Removal Tool: A Targeted Windows Malware Scanner

Why would you use this instead of Microsoft Defender, Microsoft Safety Scanner, or a piece of third-party software? The answer is that some malicious software may disable your anti-virus capabilities or be difficult to remove via traditional means.

We'll be focusing on Windows 10 in this tutorial, but you can follow along on any Windows version.įirst, though, a little more about what this malware removal tool from Microsoft is all about. It works across Windows 10, Windows Server 2019, Windows Server 2016, Windows 8.1, and earlier. In this article we're going to show you how to use the Malicious Software Removal Tool ( Microsoft MRT or MRST), a standalone tool to remove malware after an infection. 2 How to Run the Microsoft Malicious Software Removal Tool via Command Prompt.1 How to Open, Find, and Use the Malicious Software Removal Tool.I tried using SysInternals AutoRuns and looking at the Scheduled Tasks but was not able to find where it was being started. So it is definitely installed and being run daily. The update KB890830 is not installed on this computer.Īccording to the C:\Windows\debug\mrt.log, C:\Windows\System32\MRT.exe is being run daily during the "Automatic Maintenance" window defined in the Action Center section of the control panel. We also tried running wusa.exe /uninstall /KB:890830 but it returned the error: We've had issues with MRT in the past and want to remove it, but now the script has declined the update and we cannot find anything under the View installed updates section to remove it. We have a script that declines KB890830 updates for our on-premise Windows Update Server, but we recently found someone approved one of the monthly updates before the script could run and the Malicious Software Removal Tool (MRT) was installed on all of our servers.