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.
Microsoft Safety Scanner is not meant to be used as a day-to-day tool, since it does not provide real-time protection against viruses, cannot update its virus definitions and expires after ten days. On the other hand, it can be run on a computer which already has an antivirus product without any potential interference. Therefore, it can be used to scan a computer where there is a potential infection and the user wants a second check from another antivirus. It uses the same detection engine and malware definitions that Microsoft Security Essentials and Microsoft Forefront Endpoint Protection use.