McAfee Stinger is a standalone utility used to detect and remove specific viruses.Note that this is not a stand-alone anti-virus product to protect your system but rather a specialized tool to try to remove viruses from already infected systems. It's a nice tool that any tech would want to have on their thumb drives, etc. We have had good success with it. There is an FAQ is available here and recommended if you don't use tools like this on a regular basis.By default, it scans for rootkits, running processes, loaded modules, registry and directory locations known to be used by malware on a machine to keep scan times minimal.McAfee Stinger now includes Raptor BETA - a real-time behavior detection technology that monitors suspicious activity. Raptor leverages machine learning and automated behavioral based classification in the cloud to detect zero-day malware in real-time.