We live in a highly interconnected world, and while that interconnectivity brings us a growing host of new services, it means that we are increasingly vulnerable. If your computer system is not secure, it can be used by hackers to harm you or other people. Pretty much, the same types of rules that apply to protecting yourself in the real world apply to protecting yourself over the Internet and on your computer. However, there are several important differences between the dangers which you face online and the dangers which you face in the real world.