Every computer user has to worry about the potential for a virus or piece of malicious software making its way onto a device but it's often a good idea to have a virus removal program already on hand so that if an infection might be contained and quarantined fast. Of course, for computer owners who might not have immediate access to a virus removal service or provider, it's also possible to completely reformat a computer back to the state it was back when the computer first came from the factory. This is why it's good to have a backup around incase a reformatting is necessary.