If we discuss the virus, then we all know the computer virus is a software program that runs on a computer and affects the other programs without the permission of the user. A virus can cause many problems with that computer. It can change as it moves from one computer to another computer and damages the process. Often the computer virus transfers from one computer to another through networks, flash drives, the internet, or any other removable media even file burden to a DVD or CD. Now you think how the virus can move from one PC to another through the internet. When your precious computer is affected by a virus and you send emails through this computer to others, it may infect the other computer. Because the email which you send from your infected computer is also infected, and if you send this email to another computer then it will produce the virus on that computer. Commonly the virus is transferred due to flash drives just like USB; we use this for the transformation of info