Connection suddenly blocked by CPF without any reason

I was surfing my net while watching videos, then suddenly when I surfing the connection suddenly disabled… Both of my firefox and IE page can’t load, it state connection lost… Then I exit the CPF and everything works fine… I restart the CPF and all the services is auto-turn off, and I can’t turn on the CPF services manually (it just don’t let me click “Turn On”)… I restart the whole CPU and back to windows again and everything works fine again…

Anyone got this problem b4 ? Well everything works fine, but have to restart the whole windows…