My browser is IE8. Window XP Home with SP2 (Sony VAIO Desktop PCV-RS420, Pentium-4, 2.8 Ghz, 512MB Ram). I am now unable to connect to the Internet. The network diagnostic for window XP kept saying to check firewall settings for HTTP(port 80), HTTPS(port 443), and FTP (port 21). I don't know how to do that. I open the Window firewall settings on the Security Center page (Exception tab), it lists programs and services on the "Exception", ie, to not block incoming network connection from these programs or services, which include "Internet Explorer",on the list, which seems to be appropriate. But my computer still will not connect to the Internet--very frustrating. I have done "System Restore" a few times to an earlier dates, thinking maybe the computer picked up some virus and the System restore function should temporarily resolve that issue. But still no luck. Finally, I tried connecting to a secured website with "HTTPS" in the address bar and the computer appeared to be successful to connect to these HTTPS sites, but it continued to refuse to connect to a regular website(i.e. with "HTTP" in its address bar). Please help me resove these internet connection issues I would vey much appreciate.