Move over, Norton AntiVirus 2005 and McAfee VirusScan 9.0. Trend Micro has packed a ton of useful antivirus defense features into its latest PC-cillin Internet Security, making it the best antivirus app we've seen for less than $50. PC-cillin Internet Security 2005 is fast and accurate and comes bundled with a better firewall than Microsoft's Windows Firewall in Windows XP SP2--boasts that Norton and McAfee can't match. While we also like the complete protection offered by F-Secure Internet Security 2005, PC-cillin goes much further for less cost by including a more robust antispyware app, a wireless network monitor (to either allow or block wireless access to your network), and the ability to share security settings across your entire home network.