What should I do if bootmgr is missing when my win10 computer starts?

The computer will often have a black screen when starting up, and then it will prompt: "bootmgr is missing, press ctrl alt del to resrart". How to solve this problem? I believe this is a headache for friends who are not familiar with computer systems. Let’s take a look at how to solve this problem.

1. First, when the computer restarts, keep pressing the delete key to enter the system. Different system keys may be different.

2. After entering the system, select the second advanced bios features (bios advanced settings). After entering the advanced settings, find the hard disk drives option (set the hard disk drive).

#3. After entering hard disk drives, find our system disk and promote the system disk to the first place.

4. That is, change the 1st boot device from disabled to sata:s4-st500dm002-1bd142, as shown in the figure below. Then hit Enter to confirm.

5. After setting, you can press F10 to save. Just select OK and then restart your computer.

The above is the solution to the bootmgr is missing error when starting the win10 computer. I hope this method can help everyone.

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