Win7 system ntldr is missing file how to do?

            
1. When the computer hard disk information is tampered with, it is possible that the system cannot find the hard disk, can not find the system file in the system partition, can enter the Win7 system BIOS panel, then find the Standard CMOS Setup item, and then set the hard disk. For Auto.
2, under the Win7 system, set the system active partition, find an MS-DOS toolbox CD, then run Fdisk, and then select 2 (Set active partition) for system partition activation.
3, if you still can not operate, it may be because the main boot record in the Win7 system hard disk partition is destroyed, so can not find the system partition, then you can only run FDISK /MBR under the MS-DOS toolbox.