A startup disk cannot be detected when booting a computer. The disk's pressence is reported by the system firmware, But Windows still will not boot. What tool do you use to repair the drive's boot infromation?

Bootrec.exe

Explanation:

The process of turning on a computer system is called booting. When a computer system boots, it runs the post test and loads into memory, the information or program needed to run the operating system, and then locates the operating system from the boot manager record in the disk partitions. When the disk is failed to be recorded, or the boot manager or sector is corrupt or lost, the bootrec.exe command is used in the command prompt to correct these problems.

answeruse the nslookup utility;