Computer viruses almost always appeal to the various facets of human nature, thereby facilitating its very quick spread. Coming usually in the guise of innocent-looking messages and advertisements, they manage to infect computers, sometimes without even being detected at all.

Networks continue to install better defenses with each new attack. However, new ones still manage to infiltrate and infect computers as flaws in software are discovered and more innovative approaches are resorted to. Viruses do not always aim to make computers crash but rather to penetrate the system in the form of spams. To its credit, the online world manages to survive in spite of it.