If you want a program or service to communicate freely with your computer, you must add that program as an exception in the Windows Firewall. This insures that the Firewall will not block the computer and program or service from sending data back and forth.
Press the “Start” menu at the bottom of your computer screen to display the Start menu. Choose “Control Panel” from the right side of the Start menu. The Control Panel window will open up onto the desktop.
Double-click on the “Windows Firewall” icon from the Control Panel. The Windows Firewall dialog box will open.
Choose the “Exceptions” tab at the top of the Windows Firewall dialog box (if necessary). Under “Programs and Services” you will see a list of services and programs that have already been added as exceptions in Windows XP.
Click the “Add Program” button at the bottom of this list to open the Add a Program dialog box.
Scroll through the list to locate the program that you would like to add as an exception. When you have found it, click to select it and a gray rectangle will surround the name of the program.
Click the “OK” button to close the Add a Program dialog box and add the selected program as an exception in your Windows XP Firewall.
Verify the program you just added is on the “Programs and Services” list in the Windows Firewall dialog box. Close this dialog box and the control panel.