Download from here: https://www.microsoft.com/en-us/wdsi/products/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.
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.
NOTE: This tool does not replace your antimalware product. For real-time protection with automatic updates, use Windows Defender Antivirus on 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 10, Windows 10 Tech Preview, Windows 8.1, Windows 8, Windows 7, Windows Server 2016, Windows Server Tech Preview, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, or Windows Server 2008. Please refer to the Microsoft Lifecycle Policy.