I do not think ah, friends should know how much knowledge about threat defense, this is really surprising to me, so I think, I should learn from him about the two of us in the chat, he said to the threat defense, and he gave I speak a lot of people threat defense software knowledge, I also do not know ah, because I have no contact, but I think the friend said that knowledge is really practical, because he put the threat defense software that is really too good, so I decided to follow some friends to learn about the threat defense software knowledge, so, when used, can facilitate the.