Tool to manually run Windows' monthly update checks for malicious software.
Publisher’s description
What is Malicious Software Removal Tool?
Malicious Software Removal Tool is a proprietary antivirus & anti-malware program for Windows from Microsoft. It ranks 16th by popularity among antivirus & anti-malware in this catalogue.
Installation and requirements
Official installers exist for 64-bit and 32-bit as Portable. The main installer is 87.7 MB. It runs without installation (portable).
Updates and version history
The current version is 5.146, released on October 13, 2026. 7 versions are listed since February 11, 2026, each with links to its own installer files. The last update is less than a month old.
Pros / Cons
Pros
- Portable: runs without installation
- Updated in the last two months
Cons
- Proprietary licence: check the terms and price
- No native ARM64 build
In short: Malicious Software Removal Tool is an antivirus & anti-malware tool for 64-bit and 32-bit PCs.
Is Malicious Software Removal Tool safe to download?
- The file is served by download.microsoft.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
621BE47CB74E8C96EB1D9E1E4B415ECE771E28278D7422B514B9EF57F43BB606· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 7 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 5.146Latest | October 13, 2026 | 87.7 MB | 32-bit Portable64-bit Portable |
| 5.145 | September 11, 2026 | — | 64-bit Portable32-bit Portable |
| 5.144 | August 11, 2026 | — | 64-bit Portable32-bit Portable |
| 5.143 | July 14, 2026 | — | 64-bit Portable32-bit Portable |
| 5.142 | June 9, 2026 | — | 64-bit Portable32-bit Portable |
| 5.141 | May 12, 2026 | — | 32-bit Portable64-bit Portable |
| 5.139 | February 11, 2026 | — | 64-bit Portable32-bit Portable |
Install from the command line
Silent install ›winget install --id Microsoft.MaliciousSoftwareRemovalTool -eProgram files (.exe): msrt.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- Microsoft
- Category
- Antivirus & anti-malware
- Licence
- Proprietary
- Price
- See the publisher’s site
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, 32-bit
- Installer
- Portable
- Version
- 5.146
- Released
- October 13, 2026
- Added to the catalogue
- February 15, 2026
- Versions listed
- 7
- Website
- microsoft.com
- winget ID
- Microsoft.MaliciousSoftwareRemovalTool
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is Malicious Software Removal Tool free?
Malicious Software Removal Tool is proprietary (closed-source) software (licence: Proprietary). Whether it costs money depends on the edition: check the publisher’s site for prices and free tiers.
Is Malicious Software Removal Tool safe to download?
The download comes from download.microsoft.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Malicious Software Removal Tool with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does Malicious Software Removal Tool run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit and 32-bit version through emulation.
Where can I download an older version of Malicious Software Removal Tool?
The versions page lists all 7 versions with links to their official installer files, back to February 11, 2026.
Can I use Malicious Software Removal Tool without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to Malicious Software Removal Tool?
ClamAV, Malwarebytes, YARA, ESET Endpoint Antivirus and FLOSS. The alternatives page compares them.
