Computer security is the process of preventing the stored information and data from unauthorized access. By connecting to the internet, computer would be potentially faced to many threats such as worms, viruses and so on. To ensure that the internet security would not be compromised, you need to use some methods or tools to prevent it from the security breaches or threats. Some of the methods would be obtained by learning and increasing knowledge to decrease the possibility of risks and some of them should be done by professionals.