Step 1 Choose a software firewall for best results with a small home Internet network. Windows Firewall is a the most common firewall available and is included in newer versions of the Windows operating system, such as Windows XP and Windows Vista.
Step 2 Open the Window's System Control panel to access the firewall settings user interface. Click on the "Start" button followed by "Control Panel" and then click on the Window's Firewall icon in the user interface.
Step 3 Click on the option to "Allow Exceptions" to communicate through the Window's Firewall. There is a drop down box that will show all of the programs available.
Step 4 Check the boxes next to the application needing to have the exception made to allow it full access to the Internet.
Step 5 Restart the computer after allowing the application permission to access the Internet. The restarting process will change all of the computer's software settings in the computer's registry settings.
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