Win7 computer boot prompt ntldr is missing how to do

Fault map:

Ntldr: NTLDR full name is a hidden, read-only system file, located in the root directory of the system disk, used to load the operating system, is the operation The boot file of the system, the main role of ntldr is to parse the boot.ini file, and then load the operating system, so that you can enter the system normally, so you should back it up before the system is normal.
1, may be because the hard disk information has been tampered with, so it will cause the system can not find the system partition in the hard disk, so it will not find the boot file NTLDR in the system partition, the solution is to enter the BIOS In the "Standard CMOS Setup", then set the hard disk detection mode to "Auto" and "Right".
2, or the active partition is not set up, find a CD with MS-DOS toolbox, then run Fdisk, then select 2 (Set active partition) to activate the system partition;
3, if not yet If it is, the master boot record (MBR) in the hard disk is destroyed, so the system can not find the system partition, the solution is to run FDISK /MBR under the MS-DOS toolbox.