8:39 AM  Shubham Yadav  No comments

A computer virus is a small program written to alter the way a computer operates, without the permission or knowledge of the user.It can copy itself and infect a computer. So the Virus must meet two criteria:
It must execute itself. It often places its own code in the path of execution of another program. It must replicate itself. For example, it may replace other executable files with a copy of the virus infected file. Viruses can infect desktop computers and network servers alike.