Windows 7 Firewall is the location where you control and configure firewall settings. A firewall is a virtual line of defense against unwanted computers or connections trying to break into your computer through your network.
(http://www.windows7update.com/images/Windows7-Windows-Firewall.jpg)
(http://www.windows7update.com/images/Windows7-Windows-Firewall-with-Advanced-Security.jpg)
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