A virus is a self-replicating program that produce its own code by attaching copies itself into other executable codes.
Some viruses affect computers as soon as their code is execute; other viruses lie dormant until a predetermined logical circumstances is met.
Let see virus effect
1.Infect other program
2.Alters data
3.Transforms itself
4.Corrupt files and programs
5.Encrypt itself
6.Self propagates
2.Alters data
3.Transforms itself
4.Corrupt files and programs
5.Encrypt itself
6.Self propagates
Read More:http://krypsec.com/what-is-virus/
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