Download Microsoft Malicious Software Removal Tool 5.111 Download

The Windows Malicious Software Removal Tool (MSRT) helps keep Windows computers free of widespread malware. MSRT finds and removes threats and reverses the changes made by those threats. MSRT is usually released monthly as part of Windows Update or as a standalone tool available here for download.

Use this tool:

• If you have turned off automatic updates for Windows. Windows Update automatically downloads and runs MSRT in the background.
• If you suspect an infection from widespread malware families (see covered threats).
• To complement your antimalware product. This tool does not replace full-fledged antimalware such as Windows Defender Antivirus.

Characteristics

Integration with automatic updates

• Enable automatic updates to regularly get MSRT with Windows Update. The integrated version runs automatically in the background. If you want to run MSRT on demand, run the standalone version.

Release schedule

• Microsoft usually delivers MSRT with Windows Update on the second Tuesday of the month. The standalone version available on this page is delivered at the same time.

Removal results and log file

• After the standalone version of MSRT scans your computer and removes threats, it displays a report showing the threats. It also generates the following log file:
• %windir%\debug folder\mrt.log

Information for IT administrators and advanced users (KB890830)

For advanced information, read KB890830 at support.microsoft.com.

This KB entry contains information about MSRT and provides links to related topics. Visit this KB entry for more information on:

• Supported command line switches
• Release information, including the complete list of malware families covered
• Data collected during errors and discoveries
• Removal of the tool

For detailed information on deploying MSRT, IT administrators can read KB891716.

MSRT blog

• To learn more about the latest MSRT detections, read the posts about MSRT in the Microsoft Malware Protection Center blog.

Language support

• MSRT supports multiple languages. If the operating system language is not supported, MSRT uses United States English (en-us).