Sometimes Firewalls can affect connectivity. You can see if the connection issue is caused by a firewall by turning it off temporarily and then trying to visit a website you trust. 
   IMPORTANT NOTE:   Turning off your Firewall makes your PC more vulnerable to hackers, worms, or viruses. Turn it back on as soon as possible.
                           
                           
                               Article Id:
                                19476
                               
                           
                           
                               Category: Troubleshooting