How to Use the Microsoft Windows Firewall
In order to keep your PC safe from annoying or potentially dangerous threats on the Internet, a properly-configured firewall is a crucial item in helping prevent your system from becoming compromised. The Windows Firewall in Windows Vista™ is the first line of defense in helping to keep your computer safe. By preventing your computer from being infected by malware, Windows Firewall is designed to be easy to use and is automatically enabled to protect your computer as soon as Windows starts. The Windows Firewall Control Panel in Windows Vista offers several configuration options and a simple user interface to help you protect your computer.