If you are prompted to run the file as an administrator, click Yes. To do this, insert the USB flash drive or CD into the infected computer, and then double-click the downloaded file on the removable media. On an uninfected computer, browse to the Microsoft Safety Scanner download page, and then click Download Now.Ĭlick Save as, and then save the file to a USB flash drive or a blank CD.Īfter the file download is finished, run the file on the infected computer. Save the Microsoft Safety Scanner to removable media on an uninfected computer, and then run the tool on the infected computer. Method 1: Run the Microsoft Safety Scanner from removable media If a malware infection is preventing you from downloading the Microsoft Safety Scanner to your computer, use one of the following methods to download and run the tool. To remove this tool, delete the executable file (msert.exe by default).įor more information about the Safety Scanner, see the support article on how to troubleshoot problems using Safety Scanner.You cannot download the Microsoft Safety Scanner to your computer because your computer is infected by malware. For detailed detection results, view the log at %SYSTEMROOT%\debug\msert.log. Review the scan results displayed on screen.Select the type of scan that you want to run and start the scan.For details, refer to the Microsoft Lifecycle Policy.
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, or Windows Server 2008 R2.
If you're having difficulties removing malware with these products, you can refer to our help on removing difficult threats. These antimalware products also provide powerful malware removal capabilities. 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. This tool doesn't replace your antimalware product. Safety Scanner is a portable executable and doesn't appear in the Windows Start menu or as an icon on the desktop. We recommend that you always download the latest version of this tool before each scan.
To rerun a scan with the latest anti-malware definitions, download and run Safety Scanner again. Safety Scanner expires 10 days after being downloaded. Microsoft Safety Scanner only scans when manually triggered. The security intelligence update version of the Microsoft Safety Scanner matches the version described in this web page. To learn more, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS. Your devices must be updated to support SHA-2 in order to run Safety Scanner. Safety Scanner is exclusively SHA-2 signed.
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