Webroot AntiVirus with AntiSpyware and Firewall provides real-time and on-demand detection and remediation for virus and malware threats, and it boasts an easy-to-use user interface.
Fight fire with fire
Webroot's Desktop Firewall is available free of charge to Webroot customers, and it comes bundled with the AntiVirus with AntiSpyware package.
Unlike a lot of other "free" utilities, Desktop Firewall actually comes packed with quite a few features, far surpassing Microsoft's built-in firewall. There are customisable levels of protection, and it allows for different security profiles for home, office and remote access.
It includes a learning mode that builds a baseline profile for CPU use, running processes and such, and works with the baseline to clamp down on unusual activity. Also included are real-time lists of running processes and port usage to help identify abnormal activity.