Battlefield 3 "you Were Disconnected From Ea Online (1)"

I just bought BD2013 Total Security a few hours ago and I was expecting much about this AV-software. However, when the installation just finished, when I open Chrome, the CPU Usage of Chrome suddenly jumps to 100% and the browser is not responding. After a reboot, the problem was gone. But when I try to play Battlefield 3, it keeps disconnecting, saying "You were disconnected from EA Online (1)". I'm sure it is BD's problem since I can play it on another computer under the same router, and that computer doesn't have BD installed. I tried everything I can including rebooting the router but I'm still getting disconnected. Any ideas?


BTW another severe problem: when I run QQ2012 (an IM software from China), the CPU usage of it will be very stable, at 25%,no matter what I do it maintains 25% of CPU usage. Never happened before I installed BD2013. This issue also occurs randomly with other random programs.


I'm running Windows 7 64-bit. I have no other AV-soft installed on my computer.


PLEASE HELP!!!

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