Computer boot Prompt "Bootmgr is missing" What is the reason

Bootmgr is missing means: Start admin missing

　　Workaround:

Rebuilding a BCD file

1. Put the Windows Vista installation CD in the CD drive and set to boot from the CD.

2. But see "Press any key to boot from CD or DVD ..." or press any key to boot from CD, quickly press any key on your keyboard.

3. Select "Repair Computer"

4. Select the language, time, region, input method, click Next.

5. In the System Recovery Options window, tap command prompt.

6. Enter BOOTREC/FIXMBR, then press ENTER.

7. Enter Bootrec/fixboot, then press ENTER.

8. Enter BOOTREC/REBUILDBCD, then press ENTER.

　　Run System Restore through WinRE

1. Put the Windows Vista installation CD in the CD drive and set to boot from the CD.

2. But see "Press any key to boot from CD or DVD ..." or press any key to boot from CD, quickly press any key on your keyboard.

3. Select "Repair Computer"

4. Select the language, time, region, input method, click Next.

5. In the System Recovery Options window, click System Restore.

6. Select a restore point before the problem occurs according to the System Restore Wizard, and then click Finish to restart the computer.

　　Run "Start repair" via WinRE

1. Put the Windows Vista installation CD in the CD drive and set to boot from the CD.

2. But see "Press any key to boot from CD or DVD ..." or press any key to boot from CD, quickly press any key on your keyboard.

3. Select "Repair Computer"

4. Select the language, time, region, input method, click Next.

5. In the System Recovery Options window, click "Start Repair".

6. Follow the wizard prompts to complete the repair.

　Other solutions:

power-on prompt bootmgr is missing error meaning: Startup management missing ...

The following recommendations are addressed:

If the boot manager bootmgr in the C-packing directory is corrupted or missing, when you start the computer, you are prompted to not find the operating system, which is similar to the NTLDR file loss for Windows 2000/XP.

Under Windows 2000/XP, the first thing you need to know about this type of failure is that the boot manager is missing and then go to the Recovery Console and use the expand command at the command prompt to extract the Ntldr file copy from the installation CD to the C-packing directory.

In Windows Vista It's very simple, we don't need to know exactly what causes the system to fail to start, just follow these steps:

(1) First use Windows Vista to reject the strike series 1-Sesame door Introduction method, use the Windows Vista installation CD to boot the system into system recovery options, and click on the "Start repair" on it.

(2) The system presses

In the order you set, look for the causes that might cause the startup failure. In the system background, the start Recovery Checker automatically tests for Windows updates (if a patch fails to occur), system disks, disk errors, disk metadata, the target operating system, startup logs, and more.

(3) If the system finds the cause of the startup failure and fixes it, it enters the dialog box, prompting you to find and try to fix the problem.

(4) Windows Vista does not show the cause of the failure by default, and you can restart the computer by clicking the Finish button to complete the restore operation.

If you need to see the cause of the failure, you can click click here for more information about diagnostics and repairs on the dialog box. On the open dialog, we can see that the root cause is the "startup Manager" is missing, and the required file Repair tool has been successfully completed!

Then reboot to try, is this error code does not appear again!