Once the USB Key gets infected by the virus, it automatically starts creating shortcuts that make its data inaccessible and unreadable. And then, when users plug their pen drive to virus-infected PC, the virus infects the pen drive also. These tasks require the internet to connect with the outer world and using the internet sometimes can infect our computers with Trojans and other dangerous viruses. Today everyone is using computers to work online, entertainment, shopping and for other purposes.