Computer security issues have been a problem, it is there will be a lot of virus or anything, but this time I really felt a special software is easy to use, this is threat defense, especially this time I really see a lot of people have in the threat defense, but also my best friend. She is a special computer, and the computer inside the file it is more special, so the threat defense is particularly important, I still did not think she is always the threat Defense Threat defense, this feeling is particularly good, but also very safe.