symantec 

The Norton AntiVirus 2009 Gaming Edition application was designed to be the fastest virus protection you can get. Norton AntiVirus 2009 Gaming Edition stops spyware, worms, bots, and other threats cold-without slowing down your PC. When you're gaming, your protection should get out of the way. Norton AntiVirus 2009 Gaming Edition does exactly that.

Norton AntiVirus 2009 provides fast, responsive defense against all types of malicious software including viruses, spyware, worms, and other software threats. It protects your system without slowing it down. Rapid pulse updates every 5 to 15 minutes help to ensure that you're protected from the latest threats. It blocks certain more sophisticated worms (such as Blaster and Sasser) before they enter your computer.