Microsoft Safety Scanner
Microsoft Safety Scanner is a scan tool designed to find and remove malware from Windows computers. Simply download it and run a scan to find malware and try to reverse changes made by identified threats.
Starting November 2019, Safety Scanner will be SHA-2 signed exclusively. Your devices must be updated to support SHA-2 in order to run Safety Scanner. To learn more, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.
The security intelligence update version of the Microsoft Safety Scanner matches the version described in this web page.
Safety Scanner only scans when manually triggered and is available for use 10 days after being downloaded. We recommend that you always download the latest version of this tool before each scan.
Safety scanner is a portable executable and does not appear in the Windows Start menu or as an icon on the desktop. Note where you saved this download.
This tool does not replace your antimalware product. For real-time protection with automatic updates, use Microsoft Defender Antivirus on Windows 11, Windows 10, and Windows 8 or Microsoft Security Essentials on Windows 7. These antimalware products also provide powerful malware removal capabilities. If you are having difficulties removing malware with these products, you can refer to our help on removing difficult threats.
Safety Scanner helps remove malicious software from computers running Windows 11, Windows 10, Windows 10 Tech Preview, Windows 8.1, Windows 8, Windows 7, Windows Server 2019, Windows Server 2016, Windows Server Tech Preview, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, or Windows Server 2008. For details, refer to the Microsoft Lifecycle Policy.
How to run a scan
- Download this tool and open it.
- Select the type of scan that you want to run and start the scan.
- Review the scan results displayed on screen. For detailed detection results, view the log at %SYSTEMROOT%\debug\msert.log.
To remove this tool, delete the executable file (msert.exe by default).
For more information about the Safety Scanner, see the support article on how to troubleshoot problems using Safety Scanner.