Boot menu no longer works

[orgeln]

Hello,

I have an HP EliteDesk 800 35W G3 Base Model Desktop Mini PC.

So far I've been very happy with it. I was able to switch from Windows 11 to Windows 10 via a boot menu, which are on 2 different hard drives. Now I needed to restore an image of Windows 10. Then only Windows 11 could be started. In Disk Management I saw that the W10 disk was set to MBR and I switched to GPT. Nevertheless, W10 no longer boots from the boot menu and asks for the repair function of a Windows CD. Unfortunately that didn't work either. Can anyone give me a hint?

[Bill_To]

Hi @orgeln 

Welcome to the HP Forum.

I don't dual boot so this Microsoft Link may not help. Used to dual boot back in the late 1990s and early 2000s (Windows NT 4.0, Windows 2000, or Windows XP).

I am guessing W11 is the default operating system at boot? Your problem may be more involved.

It looks like the boot loader got messed up after restoring W10 using a system image.

Open an Admin command prompt. Try steps at the above link to add W10 to the boot menu.

Or try steps at this Site to fix the problem.

One of the above options should work if the restored W10 image is good.

Regards

[orgeln]

Hello Bill,

thank you for your quick response. You are absolutely right, since the two operating systems are present on the respective hard drives, the cause is a messed up bootloader.

Unfortunately, I spent many hours trying to change the settings with Easy BCD and repairing the BCD so that the respective systems would boot.  Without success! The strange thing is that when I click “ME Setup” with F5 in the BIOS, a bootloder menu appears, which works. However, I don't want to go to the ME Setup in the BIOS every time I restart. I can't get any further at this point. What does this ME Setup do?

Greetings

[orgeln]

Hello Bill,
it looks like i found a solution to the problem:
After I unchecked the quick start box in the BIOS settings, the boot process is carried out as set in the BCD boot manager and the selected system starts up.
Greetings

[Bill_To]

Hi @orgeln 

My pleasure.

I would guess ME refers to the Intel Management Engine.

It is a tiny isolated computer subsystem running within your computer. It has access to components connected to the PC.

I have no idea why the bootloader menu works when you access the function.

Okay, you solved the problem, Quick Start in the BIOS.

Regards