My Macbook Pro Retina has suddenly stopped opening web pages in Safari and Chrome. I am running windows 8 in Parrallels. In windows internet explorer web pages open quickly. On the same network i have a macmini, no problem. Likewise an iphone, ipad, nexus 7 and galaxy S4. Have cleared caches etc. My broadband is Virgin 125 Mbs. Any suggestions would be appreciated. Have tried rebooting router/modem.