It can crash your hard disk. It can destroy all or some of your data. But many viruses just do weird little things that adversely affect your computer. The most usual symptom of a computer virus is erratic behavior. The destruction can happen at any rate of speed and can affect almost any part of the computer.
Viruses can spread quickly through today s intricate cyber world.
If your computer starts to act a little weird, the first thing to do is to check for viruses. Stop viruses before they attack. If you are smart, you will stop viruses before they enter your computer. You can do this by purchasing a good virus protection program. Such a program will check all files for viruses.