Windows Malicious Software Removal Tool Download (KB890830)

Windows Malicious Software Removal Tool (MSRT) has been updated and is available for download. Windows Malicious Software Removal tool is a first aid kit against certain popular viruses and Trojans which can help remove the infections and revert the settings to default changed by these malware. The most popular malware that MSRT removes are including Blaster, Sasser, and Mydoom.

Windows Malicious Software Removal Tool is especially designed for already infected systems. So you should always have an updated version of MSRT so that if your system gets infected, you can remove the infection by simply running MSRT. Since this tool only removes specific malware, it is not a replacement for antivirus. You will always need an active antivirus for your system to be protected. There are a total of 173 malware that this tool can remove. You can see the detail of each of these malware on MSRT information page.

While this tool can be run from the graphical user interface, you can also run it from the command line. This is especially helpful if you’re an IT administrator and want to run MSRT on all the computers of your network. Here are the command line switches that you can use with MSRT.

/Q or /quiet

Uses quiet mode. This option suppresses the user interface of the tool.


Displays a dialog box that lists the command-line switches.


Runs in detect-only mode. In this mode, malicious software will be reported to the user, but it will not be removed.


Forces an extended scan of the computer.


Forces an extended scan of the computer and automatically cleans any infections that are found.

Windows Malicious Software Removal Tool can be downloaded from Windows Update website or from Microsoft Update directly from your system. But if you want to download and install it manually you can download it from the following location:

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Download Windows Malicious Software Removal Tool