Well, some download an unwanted "protection program" that blocks everything. While others just make you have no other option but to set your computer back to factory settings.
Computer viruses have been known to cause millions of dollars worth of damage.
They can cause death and other diseases
It is not possible for there to be no viruses because viruses are simply programs that do malicious things. Viruses can also be developed accidentally by flaws in the coding of a program that causes undesired effects though this is rare.
-to isolate and identify viruses in clinical specimens -prepare viruses for vaccines -to research in detail the viral structures, multiplication cycles, genetics, and effects on the host cells
If by neutral you mean benign, it only slows down your computer.
Viruses are so very small that they couldn't be seen by even the best light microscope. All people had to go by was the effects that they saw not the things causing the effects.
Some viruses are beneficial in that they have commercial uses. Examples are tulips with streaks of color. Other viruses cause diseases such as colds, HIV.
Viruses can cause colds, HIV, chickenpox, and many other damages.
Some scientists are hoping that viruses can be modified to undo damage by other viruses, but there is no actual working "damage control" virus available as of July of 2013. Many scientists are concerned that even the good virus might have unwanted side effects.
people have only spent the time and money to come up with drugs that work for the more serious viruses. also, antiviral drugs generally have significant side effects and aren't great at stopping their respective viruses... so it's only worth the side effects for viruses that are actually somewhat serious. there's no good anti-cold drug because there are hundreds of common cold viruses and they're mutating/changing all the time.
By neutralizing it or deleting it. To see its effects, then get an old computer and let it get a virus and see what happens.
Viruses are parasitic, they can infect plants, animals, and bacteria, and the can cause serious or not too serious diseases.They also infect specific tissue in the human body and cause disturbances in this organ such as flu virus