Before with my friends to buy a computer, these days my machine has a problem, there will be some It is without rhyme or reason. like viruses, instantly let the machine my reflexes dropped a lot, but yesterday I went to my friend’s home to play, play with his selling computer reaction speed will simply feel the game machine is too fast, how to maintain their own machine asked my friend who is it, my friend said he usually does not have the result of how the maintenance is to install a threat defense, he had to buy the machine on the installation of the threat defense since then, don’t tube, the threat defense can automatically check all the virus, but also automatically update the software, listen to him say that I go home after the first thing is to install the threat defense.