It thoroughly scans patch vulnerabilities, Startup items, plug-ins, services and processes, etc., in the system with its rapid and stable search engine to diagnose possible security threats and protect your system from the threats of spyware, adware, Trojans and viruses. Windows Doctor as well give features such as Registry Cleanup, Privacy Cleanup, System Speed-Up and Advanced Tools. They help you clean up garbage notification in the registry, protect your privacy, make your PC run more stable and with better performance.