About Malicious Software Removal Tool
Tool to manually run Windows' monthly update checks for malicious software.
Malicious Software Removal Tool 5.146
Tool to manually run Windows' monthly update checks for malicious software.
Technical details
| Publisher | Microsoft |
|---|---|
| Author | Microsoft Corporation |
| Version | 5.146 |
| Release date | 2026-10-13 |
| License | Proprietary |
| Installer type | portable |
| Architecture | x86, x64 |
| Package ID | Microsoft.MaliciousSoftwareRemovalTool |
Install Malicious Software Removal Tool from the command line
- Install with Windows Package Manager
winget install --id=Microsoft.MaliciousSoftwareRemovalTool -e- Update to the latest version
winget upgrade --id=Microsoft.MaliciousSoftwareRemovalTool -e- Uninstall
winget uninstall --id=Microsoft.MaliciousSoftwareRemovalTool -e
Malicious Software Removal Tool adds this command to the command line: msrt.
Malicious Software Removal Tool version history
5.145 Sep 11, 2026
5.144 Aug 11, 2026
5.143 Jul 14, 2026
Other versions
- 5.142
- 5.141
- 5.139
- 5.138.25120.1002
Frequently asked questions
Is Malicious Software Removal Tool free?
Malicious Software Removal Tool is proprietary software from Microsoft. Check the publisher's license terms for pricing and usage rights.
What is the latest version of Malicious Software Removal Tool?
The latest version is 5.146, released on Oct 13, 2026.
Is it safe to download Malicious Software Removal Tool?
The download button links to the official installer published on download.microsoft.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 621be47cb74e8c96eb1d9e1e4b415ece771e28278d7422b514b9ef57f43bb606.
Which Windows versions does Malicious Software Removal Tool support?
Malicious Software Removal Tool runs on Windows and is available for 32-bit (x86), 64-bit (x64) systems.
How do I uninstall Malicious Software Removal Tool?
Open Settings › Apps › Installed apps, find Malicious Software Removal Tool and select Uninstall. From the command line, run winget uninstall --id=Microsoft.MaliciousSoftwareRemovalTool -e.
Is there a portable version of Malicious Software Removal Tool?
Yes. Malicious Software Removal Tool is available as a portable program (Windows-KB890830-x64-V5.146.exe, 64-bit (x64)) that runs without installation. Copy it to any folder or USB drive and run it from there.
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