(Block and maintain the Windows operating system, while creating a virtualized image system that is exactly the same as the real operating system. After entering the shadow system, all operations are virtual, and comprehensive viruses and rogue software cannot infect the real operating system. If there is a problem with the system, or the Internet may generate junk files, you only need to restart the computer easily to restore the best condition in an all-round way. By the way, the registration code!!!!)