Windows Malicious Software Removal Tool


Windows Malicious Software Removal Tool
Malicious Software Removal Tool
The Windows Malicious Software Removal Tool Icon
MSRT Screenshot.png
A screenshot of Malicious Software Removal Tool
Developer(s) Microsoft
Stable release 4.0 / 2011 September 27; 47 days ago (27-09-2011)
Development status Active
Operating system Windows 7
Windows Vista
Windows Server 2003
Windows Server 2008
Windows Server 2008 R2
Windows XP
Windows 2000
Platform Microsoft Windows
Size ~14 MiB
Available in English, Arabic, Chinese, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish and Turkish
Type Anti-virus
License Closed source freeware
Website microsoft.com/security/pc-security/malware-removal.aspx

Microsoft Windows Malicious Software Removal Tool is a freely-distributed virus removal tool developed by Microsoft for the Microsoft Windows operating system. First released on January 13, 2005,[1] it is an on-demand anti-virus tool that scans the computer for specific widespread malware and tries to eliminate the infection. It is automatically distributed to Microsoft Windows computers via Windows Update service but can also be separately downloaded.[2][3][4]

The program is usually updated on the second Tuesday of every month and distributed via Windows Update, at which point it runs once automatically in the background and reports if malicious software is found. Alternatively, users can manually download this tool from Microsoft Download Center.[3] It records its results in a log file located at %windir%\debug\mrt.log.[2] To run it manually at other times, users can start "mrt.exe" using the Command Prompt or Run command in the Start Menu.

As released, the tool is configured to report anonymized data about infections to Microsoft if any are detected.[2] The reporting behavior is disclosed in the tool's EULA, and can be disabled if desired.[5]

In a June 2006 Microsoft report,[6] the company claimed that the tool had removed 16 million instances of malicious software from 5.7 million of 270 million total unique Windows computers since its release in January 2005. The report also stated that, on average, the tool removes malicious software from 1 in every 311 computers on which it runs. As of 19 May 2009 Microsoft claims that the software has removed password stealer threats from 859,842 machines.[7]

Further reading

References

  1. ^ "Windows Malicious Software Removal Tool: Progress Made, Trends Observed". Microsoft. http://www.microsoft.com/downloads/details.aspx?FamilyId=47DDCFA9-645D-4495-9EDA-92CDE33E99A9&displaylang=en. Retrieved 10 March 2010. "Microsoft delivered the first version of the MSRT on January 13, 2005 in 24 languages to users of Windows 2000, Windows XP, and Windows Server 2003 computers." 
  2. ^ a b c "The Microsoft Windows Malicious Software Removal Tool helps remove specific, prevalent malicious software from computers that are running Windows 7, Windows Vista, Windows Server 2003, Windows Server 2008, Windows XP, or Windows 2000.". Microsoft Support Center. Microsoft Corporation. 8 December 2009. http://support.microsoft.com/kb/890830. Retrieved 22 December 2009. 
  3. ^ a b Windows Malicious Software Removal Tool download "Download Details: Microsoft Windows Malicious Software Removal Tool (KB890830)". Microsoft Download Center. Microsoft Corporation. 8 December 2009. http://www.microsoft.com/downloads/details.aspx?FamilyId=AD724AE0-E72D-4F54-9AB3-75B8EB148356 Windows Malicious Software Removal Tool download. Retrieved 22 December 2009. 
  4. ^ Savill, John (2005). "Windows IT Pro - "What's the Microsoft Windows Malicious Software Removal Tool?"". http://www.windowsitpro.com/Article/ArticleID/45410/45410.html. Retrieved 5 July 2006. 
  5. ^ "Deployment of the Microsoft Windows Malicious Software Removal Tool in an enterprise environment". 8 December 2009. http://support.microsoft.com/kb/891716. Retrieved 22 December 2009. "Q3. How can I disable the infection-reporting component of the tool so that the report is not sent back to Microsoft? A3. An administrator can choose to disable the infection-reporting component of the tool by adding the following registry key value to computers [~snip~]" 
  6. ^ "The Windows Malicious Software Removal Tool: Progress Made, Trends Observed". Microsoft. 11 October 2006. http://www.microsoft.com/downloads/details.aspx?FamilyId=47DDCFA9-645D-4495-9EDA-92CDE33E99A9&displaylang=en. Retrieved 22 December 2009. 
  7. ^ "Microsoft cleans password stealer tools from 859,842 PCs". Ars Technica. 2009. http://arstechnica.com/microsoft/news/2009/05/microsoft-cleans-password-stealer-tools-from-859842-pcs.ars. Retrieved 21 May 2009. 

External links


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