In the morning, I was awakened by a friend’s phone, he said that his mobile phone computer has a problem, let me hasten to give him repaired, he was waiting for it, heard him say this, I hurried to pick up, I went to a friend home, I saw a friend anxious sweating profusely, then I looked at the computer, I found that this is a problem, then I gave him the installation of a threat defense software, I told my friend, as long as there is the threat defense software, after such a problem will no longer appear I told a friend, some threat defense, I think this is very necessary, because anything after a friend will know how to deal with.