OP hadn't responded in like a week, I even mentioned him and he wouldn't post. I'm pretty sure this can happen due to many different reasons, I'm assuming he fixed his and so far I haven't heard him complain about it. As a rule of thumb though, check for anything that might screw around with your network connection, including VPN clients, virtual network managers etc.
If everything else fails and you still feel the great urge to play WR, try removing McAfee and disabling your firewall. If it still doesn't work feel free to install McAfee again and reenable your firewall.