Fault phenomenon: When upgrading the hard disk, the hard disk is divided into areas, and then the data of the original hard disk is copied to the new hard disk, this process has been normal, but after removing the original hard disk, the new hard disk cannot start the computer, and the system prompts: "PRESS A KEY RESTART". 　　Fault analysis and handling: It is estimated that the partition is the main partition of the new hard disk that has not been activated, resulting in the failure of the hard disk to boot. You only need to use the Windows