It seems like the problem resides in the configuration of your firewall and settings of your computer.
I suggest you turn off your firewall for this period of testing using this command:
Start > RUN > CMD prompt
in the:
netsh firewall set opmode disable
then try and reload the page.
Also make sure there are no active proxies configured for your browser. You can check the following:
Mozilla Firefox: Menu > Tools > Options > Advanced > Network and check "No Proxies"
Internet Explorer : Menu > Tools > Internet Options > Connections > Lan Settings and uncheck
the option above proxy field.
Google Chrome : Wrench > Tools > Settings > "Show advanced options" > Change Proxies > {and follow the rest from Internet Explorer method, it's the same}
Another solution is to clear your DNS Cache using this command in CMD Prompt you opened earlier: ipconfig /flushdns
and perform a restart of your computer and try to load the page again.
Note: If you want to enable your firewall back use enable
instead of disable at the end of the command.