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The Microsoft Safety Scanner is a free downloadable security tool that provides on-demand scanning and helps remove viruses, spyware, and other malicious software. It works with your existing antivirus software.

The Microsoft Safety Scanner, expires 10 days after being downloaded. To rerun a scan with the latest anti-malware definitions, download and run the Microsoft Safety Scanner again. Do note that its not exactly a small file … its msert.exe file is a 68 MB download!

If MSS detects Malware or if an error occurs when MSS is running, a report is sent to Microsoft that contains basic information about the Malware or about the error. The reports sent to Microsoft include technical information about MSS, Malware found, and your computer, such as, MSS version number, file names, cryptographic hash, size, date stamp, and other characteristics of any Malware removed from the computer, the success or failure of Malware removal, the computer’s manufacturer, model and processor architecture, etc.