In many cases, to connect our memory USB in a computer, this is infected with any of the known viruses that run when we connect ourmemory (or autorun), and thus, also infecting computers to which we connect. So the solution so as not to infect our memory this type of virus, we created a text document in our memory USB called autorun.inf (formerly with the. Txt, or any extension). Two other named recycler and restore (by removing the format any), which are the folders where they usually keep that kind of virus. By creating these files, a virus can not infiltrate our memory USB, as it creates the same files for execution but can not save because there are others with the same name. To prevent virus modify or delete our files, let’s start -> Run -> type cmd and we accept. Under the program wrote: Attrib + h + s + r-ay file path, for example: attrib + h + s + r-a H: autorun.inf, where H is the letter of the USB drive. So with everyone else.