entry points security

Friends suddenly asked my computer have installed entry points security will tell my friends my colleague had told me before but I have no installation, friends listen to what I speak let I to install entry points in computer security that can protect the computer, but also can make your computer run speed quickly, listened to the friend about what I said is really that good? Friends say a lot of people are using it now, it is very convenient, listen to the friend and I said I will give my computer to install a try in the evening, friends heard what do I say I am tried a will have been use, said she was like me hold try attitude did not expect was rather easy to use.