Reinstalling Windows Boot Manager?

[Melodist]

Hello guys,

 

I run pretty much 3 different operating systems in my drive and the problem is, that once I've formated the drive containing the boot manager and set up the OS anew, Windows won't add another Boot Manager and I lose my Bootscreen.

 

The only way it has worked so far, was always, when there were 0 OS dives installed and Windows then added the Bootmanager to the second OS that's been installed if I remember correctly?

 

Isn't there a way to reintegrate the boot manager once the drive with it has been formated and set up with a fresh OS?

[kelvinhall05]

wait what

 

 

I have no idea what you're trying to ask about. From what I gather, you had a drive partitioned for three different operating systems. Instead of something like Grub, you used Windows Boot Manager. You formatted the drive with all your OSes, installed Windows as the only OS on that drive, and then have a second drive or partition with a second OS that Windows now won't recognize as bootable or whatever (you can't find it in your boot manager).

 

Am I following?

[Melodist]

No, I have 3 physical drives with 3 different W10 operating systems on it.

 

At some point, I guess when you install the second Windows 10 operating system? Windows will add the boot manager to one of the OS' drives.

 

When I format that drive, because I want a fresh Windows install, I obviously also format the boot managery but Windows will not readd the boot manager.

 

I solved this in the past by formating all system drives again and reinstalling Windows 10 again on each drive one by one.

 

But when I format the drive with the Windows 10 boot manager now, while having remaning OS' in my system, it won't reinstall the boot manager.

 

[TheDelphiDude]

16 hours ago, Melodist said:

But when I format the drive with the Windows 10 boot manager now, while having remaning OS' in my system, it won't reinstall the boot manager.

Can you boot into the freshly installed Windows? If so, the boot manager is reinstalled. It's just missing the entries for the other Windows installations. You'll have to manually add those with BCDEDIT.

[Melodist]

8 minutes ago, TheDelphiDude said:

Can you boot into the freshly installed Windows? If so, the boot manager is reinstalled. It's just missing the entries for the other Windows installations. You'll have to manually add those with BCDEDIT.

Ah, is there a tutorial for that?

[TheDelphiDude]

From Microsoft:

https://docs.microsoft.com/en-us/windows-hardware/drivers/devtest/editing-boot-options