If i understand you correctly, you are unable to access the website facebook.com? and when you attempt to reach that website you get a message about an incorrect address? Is that correct? can you reach other websites like google.com or yahoo.com ? if you can reach all websites except for facebook.com check your windows HOSTS file to see if its been tampered with. its also possible that some firewall software or even your router has been setup to block you from accessing that site.