I would like to mention Microsoft Safety Scanner.
It is a scan tool that permit to find and remove malware.
Usage is really simple, after downloading you simple need to run it to start scanning threat search.
It can be launched only on demand and is available only for 10 days after being downloaded.
BE AWARE to download allways the latest web version
REMARK: 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.
About troubleshooting related to Microsoft Safety Scanner you can review this article too:
https://support.microsoft.com/en-us/help/2520970/how-to-troubleshoot-an-error-when-you-run-the-microsoft-safety-scanner
