Computer under Attack

       There are three categories of virus causing problem for any computer users. First of all, a Trojan Horse. It is created to obtain credit card details or bank password. Another one, a Spyware. It gathers data of the computer's owner. Finally, a Spam. It cheats people and gets money from them. (Philpot,2011:p.47)

Reference:

Philpot,S.(2011).Academic Skills.Oxford:Spain