What is the essential difference between traditional computer viruses and non-traditional computer viruses?

Traditional computer virus firewall can stop it. Non-traditional computer viruses are harmful, which affect the work of the system, destroy data or steal data.

A set of computer instructions or program codes compiled or inserted into a computer program by a computer virus, which destroys computer functions or data, affects the use of the computer and can replicate itself, is called a computer virus. It is destructive, reproducible and contagious.

Computer viruses do not come from sudden or accidental reasons. Sudden power failure and accidental errors will produce some random codes and random instructions in the computer's disk and memory, but these codes are disorderly and chaotic. Virus is a relatively perfect, exquisite and rigorous code, which is organized in strict order to adapt to the network environment of the system. Viruses don't form by chance, and they need a certain length. This basic length is probabilistically impossible to be generated by random codes.

Nowadays, popular viruses are written by people on purpose, and most viruses can find the author and source information. From a large number of statistical analysis, the main situation and purpose of virus authors are: some talented programmers are dissatisfied with their bosses in order to express themselves and prove their abilities, for curiosity, for revenge, for congratulations and courtship, for getting control passwords, for software not getting paid, and so on. Of course, there are also political, military, religious, ethnic and patent reasons.