When someone hears the word ”Virus” it is natural that he/she gets
a sudden shock. The behavior of a computer virus is very much similar to a
biological virus in that both are intentionally harmful to the normal function of
a system. The following may be indications that someone’s computer is infected
by a computer virus.
Programs do not work as usual!

Parts of the system become unstable!

Unexpected error and warning messages!

Invaded storage and memory areas!

Corrupted and missing files!

Unusual activities in the system!

Computer is slowing down!

Unreasonable reduction of hard disk space!

System fails to boot unexpectedly!




After observing the symptoms, one would try to find answers to the following
questions.

Why should I care about computer viruses?

What is a computer virus and what kinds of viruses do exist?

How do viruses get transmitted or spread?

What precautions should I take to avoid my computer from virus infections?