How computer viruses are created? The earliest concept of a computer virus can be traced back to 1959, when the U.S. AT & T Bell laboratories (Bell), there is something called "magnetic core wars" (core war) electronic game players, each of the two sides to write a program, enter same computer, so that the two sets of programs in the computer's memory system to kill each other, sometimes they will set some checkpoints, sometimes stopped to repair, rewritten destroyed by each other a few lines of instructions. When the program is trapped, it can replicate themselves to flee danger.Both programs into the computer, play games, people can only look at the on-screen display of fighting, and not do any changes to the program until a party by the other program completely "eaten" by far. Because the scope of the operation of the program in the magnetic core of the computer's memory, so called "magnetic core war. By three young Bell Labs programmers-H, Douglas McIlroy, the Victor Vysottsky and Robert T. Morris, co-inventor of the game, the significance of its representatives that the program is self a lot of copy, and can be carried out with other programs confrontationthe damage caused by computer software, hardware damage. Then, in 1987, a pair of Pakistani brothers of copy in order to combat software program to write a C-Brain, once it was stolen copy software, this program will begin eating the stolen copy hard disk space. The original intention of the C-Brain is the protection of intellectual property rights, but then the vicious variant of the C-Brain, emerging, and eat the hard drive of the virus. At first, the computer connection is separate, so when a computer is infected with a virus, we simply turn it off can. But in the fall of 1988, as America's Cornell University student Robert T. Morris, Jr started on the Internet first only Internet Worm, computer and network links, resulting in tens of thousands of computers were infected , and since then the virus spread through the network to time, the general public and therefore began to focus on the network behind the risk, as well as security issues.