Computer Virus: Computer virus is
a set of code that is able to be copied by itself and then corrupt the whole
system or destroy some data from the computer memory. Some of the computer
viruses are Trojan Horses, Worm, Malware, Spyware and so on.
Trojan Horse: This is a computer
virus which spread only when copied to another system and pretend to use the
whole system while they are doing something destructive in the system.
Worm: Worm can replicate itself
and use memory. It is unable to add itself to another system.
Malware: Malware can damage the
computer system as intelligently so that the suer doesn’t get any knowledge
Spyware: Spywar is also a kind of
malware. When installing in a computer it collects information about users
without informing them and transfers them somewhere else. Password is such kind
of user information.
Antivirus: This is also a set of
program which can identify the viruses in the computer system and prevent them
and save the system.