That would be version 2.8 of the Windows Malicious Software Removal Tool. It's currently out of date and has been replaced with version 2.9. You can read more about the Removal Tool at: http://www.microsoft.com/security/malwareremove/default.mspx Alternatively, you can download the latest version of the tool as of this posting at: http://www.microsoft.com/downloads/details.aspx?FamilyId=AD724AE0-E72D-4F54-9AB3-75B8EB148356&displaylang=en