Computer virus is a malicious program that requires a host and is designed to make a system sick just like a real virus.
Computer viruses can spread from computer to computer, and they can replicate themselves.
Some viruses are categorized as harmless pranks, while the others are far more malicious.
Most of the viruses are spread by e-mail attachment and warn them to be suspicious of any files attached to unsolicited messages.
Types of Viruses
There are three types of viruses described in the table given below:
|File infectors||attach themselves to a program file|
|Boot sector viruses||install themselves on the beginning tracks of a hard drive|
|Macro viruses||infect data files|
Characteristics of Computer Virus
Here are the characteristics of a computer virus:
- virus is able to replicate
- virus requires a host program as a carrier
- virus is activated by external action
- virus's replication ability is limited to the (virtual) system
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