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*** Hopeleonie ***Flag for Switzerland

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How to delete Windows 10 Boot Managers?

Hi

I have reinstalled Windows 10 beta twice on my test laptop. But when I install Windows 7 now it will no more boot. I will just see a black screen.
Sometimes I event can’t format the old partitions with the Windows 7 DVD. Then I have to delete all Partitions with a Paragon recovery Linux CD. I think the problem is because the Windows 10 Boot Managers?

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If yes how can I get rid of them both?

Any help would be greatly appreciated
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Kanti Prasad

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@Kanti Prasad
I will try the bcedit command

@McKnife
diskpart will work with Windows 7 DVD?

@Roshan Ejaz
How can I remove it using MSConfig? I think EasyBCD will not work for me as I have Windows 7 Pro and Windows 10 Pro.
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REIT

Type MSConfig into a run command, then click the Boot tab, then remove the entries for Windows Boot Manager which are listed for OS's that no longer exist.
Not only diskpart. That is winPE.
@Roshan Ejaz
I only see Windows 7

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@McKnife
Will try diskpart and bcedit now
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@David
Hi David

I will have to change legacy boot again for Windows 10?
no you don't have to.. it just means that you are defeating the secure boot procedure.. I personally don't know how to modify the UEFI bios to remove entries that are added to it other than re-flashing the bios.
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@Fouad Maidine
Can I use EasyBCD if I have Windows 7 Pro and Windows 10 Pro?
@Fouad Maidine
I did bcdedit /delete {aaaaaaaa-bbbb-eeee-ffff-cccccccccccc} but still have 2  Boot Managers

@McKnife
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Did not help

@to all
I think I have to re-flash my Bios
You didn't execute the commands.
The clean command wipes the whole disk and all boot entries with it.
@McKnife
So I have to reinstall the test client again?
I will do that tomorrow.
@hopeleonie

Yes you can use Easy Bcd if you have 7 Pro and 10 Pro
EasyBCD will NOT remove entries in the UEFI bios.
http://www.easyuefi.com/index-us.html is one program to edit the uefi boot entries

or boot into a recent linux live cd and use efibootmgr to remove the entry by number, as in:
# efibootmgr -v
Timeout: 10 seconds
BootOrder: 0000,0007,0006,0008
Boot0000* windowsbootmanager(2,1b8,64000,f1b7598e-baa8-16ea-4ef6-3ff3b606ac1e)File(\EFI\Miccrosoft\bootmanager.efi)
Boot0006* Hard Drive	BIOS(2,0,00)SATA: ST32000542AS            .
Boot0007* CD/DVD Drive	BIOS(3,0,00)PATA: HP DVD Writer 1040r     .
Boot0008* INTERNAL EFI SHELL: ST32000542AS	ACPI(a0341d0,0)PCI(1f,2)ATAPI(1,0,0)HD(2,1b8,64000,f1b7598e-baa8-16ea-4ef6-3ff3b606ac1e)File(\EFI\BOOT\BOOTX64.EFI)
# efibootmgr -b 0000 -B

Open in new window

http://bit.ly/1ImJIUB
> So I have to reinstall the test client again?
For the diskpart clean way, yes.
@Fouad Maidine
We had an EasyRE CD from Neosmart and it coud not fix the problem.

@McKnife
diskpart
List disk
Select disk x
Clean

did not work.

@David
Now I will try efibootmgr
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@to all
Thanks a lot