Windows XP Service Pack 2 and Service Pack 3 have a built-in firewall. This document will show you how to start or stop the firewall. If your computer has Service Pack 2 or Service Pack 3 installed the firewall will be turned on by default.
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These products are no longer actively supported by Microsoft. No further development will take place on these products and security updates are no longer issued. It is highly recommended that you upgrade to Windows 10 or 8.
To open the Firewall control panel: