Firewalls and Anti-virus
Firewalls and Anti-Virus software can interfere with a program that you are trying to use or access websites. You will need to make sure they are configured properly.
If you are having an issue with the system. Try turning off the firewall or anti-virus program and see if the problem goes away. For the procedure of turning off or on your firewall or anti-virus software please see the manufacturer of that software for directions.