make copy of hosts file first!! then copy and paste below under: 127.0.0.1 localhost   Windows XP, Vista and Windows 7 C:\WINDOWS\system32\drivers\etc\hosts Windows 2000  C:\WINNT\system32\drivers\etc\hosts Windows 98/ME C:\WINDOWS\hosts # Block Facebook 127.0.0.1 www.facebook.com 127.0.0.1 facebook.com 127.0.0.1 static.ak.fbcdn.net 127.0.0.1 www.static.ak.fbcdn.net 127.0.0.1 login.facebook.com 127.0.0.1 www.login.facebook.com 127.0.0.1 fbcdn.net 127.0.0.1 www.fbcdn.net 127.0.0.1 fbcdn.com 127.0.0.1 www.fbcdn.com 127.0.0.1 static.ak.connect.facebook.com 127.0.0.1 www.static.ak.connect.facebook.com...