You can disable the reporting feature. For information about how to disable the reporting component and how to prevent this tool from sending information to Microsoft, see Deploy Windows Malicious Software Removal Tool in an enterprise environment. An infection was found but was not removed.

Note This result is displayed if suspicious files were found on the computer. To help remove these files, you should use an up-to-date antivirus product.

An infection was found and was partially removed. Note To complete this removal, you should use an up-to-date antivirus product. A3: Yes. Per the terms of this tool's license terms, the tool can be redistributed. However, make sure that you are redistributing the latest version of the tool. A4: If you are a Windows 7 user, use Microsoft Update or the Microsoft Update Automatic Updates functionality to test whether you are using the latest version of the tool.

Or, use the Windows Update Automatic Updates functionality to test whether you are using the latest version of the tool. Additionally, you can visit the Microsoft Download Center. Also, if the tool is more than 60 days out of date, the tool reminds you to look for a new version of the tool. A5: No. The Microsoft Knowledge Base article number for the tool will remain as for future versions of the tool. The file name of the tool when it is downloaded from the Microsoft Download Center will change with each release to reflect the month and the year when that version of the tool was released.

A6: Currently, no. Malicious software that is targeted in the tool is based on metrics that track the prevalence and damage of malicious software. A7: Yes. By checking a registry key, you can determine whether the tool has been run on a computer and which version was the latest version that was used. If you have already run the current version of the tool from Windows Update, Microsoft Update, Automatic Updates, or from either of the other two release mechanisms, it will not be reoffered on Windows Update or Automatic Updates.

For Automatic Updates, the first time that you run the tool, you must be logged on as a member of the Administrators group to accept the license terms. A9: The tool is offered to all supported Windows and Windows Server versions that are listed in the "Summary" section if the following conditions are true:. A Yes. Even if there are no new security bulletins for a particular month, the Malicious Software Removal Tool will be rereleased with detection and removal support for the latest prevalent malicious software.

A When you are first offered the Malicious Software Removal Tool from Microsoft Update, Windows Update, or Automatic Updates, you can decline downloading and running the tool by declining the license terms. This action can apply to only the current version of the tool or to both the current version of the tool and any future versions, depending on the options that you choose. If you have already accepted the license terms and prefer not to install the tool through Windows Update, clear the checkbox that corresponds to the tool in the Windows Update UI.

A If it is downloaded from Microsoft Update or from Windows Update, the tool runs only one time each month. A No. Unlike most previous cleaner tools that were produced by Microsoft, the MSRT has no security update prerequisites.

However, we strongly recommend that you install all critical updates before you use the tool, to help prevent reinfection by malicious software that takes advantage of security vulnerabilities. You can use the microsoft. A In some cases, when specific viruses are found on a system, the cleaner tool tries to repair infected Windows system files.

Although this action removes the malicious software from these files, it may also trigger the Windows File Protection feature. If you see the Windows File Protection window, we strongly recommend that you follow the directions and insert your Microsoft Windows CD. This will restore the cleaned files to their original, pre-infection state. A The tool does use a file that is named Mrtstub. If you verify that the file is signed by Microsoft, the file is a legitimate component of the tool.

Double-click the Mrt. Windows More The MSRT differs from an antivirus product in three important ways: The tool removes malicious software from an already-infected computer. Malicious software family Tool version date and number Caspetlod July V 5.

A April V 5. A October 5. ARXep June 5. ARXbxep June 5. A March 4. AT November 3. AU August 3. C August 3. B August 3. A August 3. B August 1. A August 1. MC August A 1. MB August A 1. MA August A 1. A August A 1. O August A 1. E August A 1. D August A 1. C August A 1. B August A 1. A1: Yes. Q4: How do I know that I'm using the latest version of the tool? Q5: Will the Microsoft Knowledge Base article number of the tool change with each new version?

Q6: Is there any way I can request that new malicious software be targeted in the tool? Q7: Can I determine whether the tool has been run on a computer? A8: Several scenarios may prevent you from seeing the tool on Microsoft Update, Windows Update, or Automatic Updates: If you have already run the current version of the tool from Windows Update, Microsoft Update, Automatic Updates, or from either of the other two release mechanisms, it will not be reoffered on Windows Update or Automatic Updates.

You must be able to start, stop, or otherwise revoke authorization to software. Software that changes your browsing experience must only use the browser's supported extensibility model for installation, execution, disabling, or removal.

Browsers that don't provide supported extensibility models are considered non-extensible and shouldn't be modified. You must be able to start, stop, or otherwise revoke authorization given to software. Software should obtain your consent before installing, and it must provide a clear and straightforward way for you to install, uninstall, or disable it.

Software that delivers poor installation experience might bundle or download other "unwanted software" as classified by Microsoft. Software that promotes a product or service outside of the software itself can interfere with your computing experience.

You should have clear choice and control when installing software that presents advertisements. Include an obvious way for users to close the advertisement. The act of closing the advertisement must not open another advertisement. Microsoft maintains a worldwide network of analysts and intelligence systems where you can submit software for analysis.

Your participation helps Microsoft identify new malware quickly. After analysis, Microsoft creates Security intelligence for software that meets the described criteria. This Security intelligence identifies the software as malware and are available to all users through Microsoft Defender Antivirus and other Microsoft antimalware solutions.

Our PUA protection aims to safeguard user productivity and ensure enjoyable Windows experiences. This protection helps deliver more productive, performant, and delightful Windows experiences.

Advertising software: Software that displays advertisements or promotions, or prompts you to complete surveys for other products or services in software other than itself. This includes software that inserts advertisements to webpages. Torrent software Enterprise only : Software that is used to create or download torrents or other files specifically used with peer-to-peer file-sharing technologies.

Cryptomining software Enterprise only : Software that uses your device resources to mine cryptocurrencies. Bundling software: Software that offers to install other software that is not developed by the same entity or not required for the software to run. Also, software that offers to install other software that qualifies as PUA based on the criteria outlined in this document.

Marketing software: Software that monitors and transmits the activities of users to applications or services other than itself for marketing research. Evasion software: Software that actively tries to evade detection by security products, including software that behaves differently in the presence of security products. Poor industry reputation: Software that trusted security providers detect with their security products. The security industry is dedicated to protecting customers and improving their experiences.

Microsoft and other organizations in the security industry continuously exchange knowledge about files we have analyzed to provide users with the best possible protection. Skip to main content. This browser is no longer supported.

Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback? Note New forms of malware and potentially unwanted applications are being developed and distributed rapidly. Submit and view feedback for This product This page. No matter the techniques or tools. We have come a long way in being able to detect and understand some attacks.

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