Norton AntiVirus 2009

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.
Working quickly and quietly in the background, Norton AntiVirus requires little memory and system resources. The new Norton Insight relies on extensive online intelligence to target only those processes at risk, resulting in faster, shorter, fewer scans. And the new Norton Protection System employs a multilayered set of security technologies that work in concert to detect, identify, and block attacks. Version 2009 improves on product performance

AVG Anti-Virus

AVG Anti-Virus

This antivirus program for your home or office computer is easy on system resources and simple to install and use. The fully automated update process will keep your computer protected at all times. Components include AVG Email Scanner, which checks your incoming and outgoing e-mail for viruses; AVG Resident Shield, which checks for viruses as files are opened, executed, and saved and will prevent you from opening or running an infected file; and AVG Virus Vault, a place where infected files are isolated so they cannot cause damage to your system.

Quick Heal AntiVirus Plus 2009

Publisher's description of Quick Heal AntiVirus Plus 2009
Detects and removes viruses, worms and Trojans automatically. Protects your files, scans and cleans infection from e-mail attachments and Internet downloads automatically. Blocks spywares before they get installed on your PC. Protects your privacy by detecting and cleaning spywares and blocking their activities of identity theft automatically. Firewall protects against known and unknown internal and external network based attacks.
Version 10.0 adds new advanced malware scanning engine that scans registry, files and folders at lightening speed to thoroughly detect and clean Spywares, Adwares, Roguewares, Dialers, Riskwares and lots of other potential threats in your system.