Essential PC Protection Kaspersky Anti-Virus is the backbone of your PC's antivirus security system, working behind-the-scenes to deliver the fastest and most trusted computer virus and spyware protection in the world. Real-time protection against computer viruses, spyware, Trojans, rootkits, and more The backbone of your PC's antivirus security system, it works behind-the-scenes with intelligent scanning and small, frequent updates, while delivering real-time, cloud-enabled protection from the latest threats. Ensures the applications on your PC are safe Goes beyond simply scanning for vulnerabilities to include now analyzing and controlling the actions of programs and applications with vulnerabilities, so they can't cause any harm. Rapid reaction to new and emerging threats When suspicious or unrecognizable data is encountered, it's automatically analyzed by our lab, and real-time, protective updates are issued to all of users, giving you the ultimate protection as new threats emerge. Optimized PC Performance Works behind-the-scenes to provide maximum, hassle-free protection without slowing down your PC.