threat defense

The machine for some time before I also don’t know how it always crashes, slow response was good, then let me one of these very professional friends specially to me what is the reason, my friend looked after me directly to the installation of a threat defense, when I was in my mind what the hell is this threat defense, how can my friends ask me directly to install the threat defense, later I realized that it is because my friend gave me the machine installation of the Defense Threat let such machine my reaction faster, this threat defense antivirus function is very Niubi, as long as it is after the installation of the threat defense you don’t have to worry about the problem of the virus in the machine.