Repair Boot Manager – If you ever have problems with the boot manager, you can fix it. Here we show you what you have to do.
With the built-in Windows 10 boot manager Microsoft allows the simultaneous use of multiple operating systems on a PC. In addition to Windows 10, you can also use older versions of Windows or alternative systems such as Linux . At startup, you can then choose which operating system you want to use. If the boat manager ever causes problems, we will explain here how to proceed.
How to fix the boot manager
What to do if bootrec can not find a Windows installation?
Follow our step-by-step guide or take a look at the Quick Start Guide .
Step 1:
First of all, you need to load the Windows 10 advanced startup options . Turn off your PC and start it again. Then press the [F8] key repeatedly . If the Windows logo appears , you must repeat the process .
2nd step:
If you are in the advanced startup options, click the ” Troubleshooting ” and ” Advanced Options ” and then switch to ” prompt “.
3rd step:
Now enter the following commands one after the other :
bootrec / fixmbr – This command writes a new master boot record to disk
bootrec / fixboot – This command writes a boot sector to the hard disk that is compatible with Windows 10.
bootrec / scanos – This command scans all volumes for installations that are compatible with Windows 10.
4th step:
Then close the command prompt and return to the advanced startup options home screen . Click on “Turn Off PC ” and then turn it on again to reboot .
What to do if bootrec can not find a Windows installation?
If the previous step-by-step guide did not solve the problem of the failed boot manager, there is another method through bcdboot to fix the problem. Proceed as follows:
Download the advanced startup options of Windows 10. Turn off your PC and start it again. Then press the [F8] key repeatedly .
Now type in ” select partition X “, where X is the partition where your Windows is installed.
Now enter ” type active “.
Then enter ” type exit “.
With ” bcdboot c: \ windows ” you can restore the bootloader. Please adjust the drive letters, in the example c: is the Windows partition .
Finally, restart your PC.
Quick start Guide
Start your PC in the advanced startup options menu by repeatedly pressing the [F8] key after turning on the PC . If the Windows logo appears , you must repeat the process again .
Now click on the Advanced Boot Options to ” troubleshooting ” and ” Advanced Options ” and then select ” command prompt “.
Enter the following commands one after the other :
” bootrec / fixmbr ”
” bootrec / fixboot ”
” bootrec / scanos “
Close the command prompt and click “Turn Off PC ” on the startup screen of Advanced Boot Options . Then restart your PC.
