
According to the recent research conducted by Microsoft, more than 2.2 million PCs in the last six months are part of Botnet ie the network of infected computers. Brazil ranked second with the number of infected PCs at 550,000.The company conducted the research to aware the users about the danger of malicious networks. When a virus infects a computer through spam or an infected web page, the PC is turned into a botnet. The virus puts the Windows machine under the control of a network of infected PCs.