Windows 10: How to boot into bootable differencing vhdx in Hyper-V

Hello, I am trying to upgrade my boot to VHD VHDX to the latest Windows 10 update using this terrific tutorial from @Kari: Native boot Virtual Hard Disk - How to upgrade Windows However, I am having trouble getting the vhdx to boot in Hyper-V. Everything seems to work as expected, but when I get to step 1.18, Hyper-V gives a "The boot loader did not load an operating system" error booting off the VHDX. I wonder if the boot files are getting created appropriately. When I run c:\windows\system32\bcdboot c:\windows /s c: it says it worked correctly, but if I run bcdedit /v after that, it says "The boot configuration data store could not be opened. The requested system device cannot be found." The c: drive is available via the windows installation command prompt. Other possibly useful information: - The VHDX is a differencing disk, and the parent VHDX file is read-only - The VHDX was created in Windows and initialized for Windows install using DISM. It was not created in Hyper-V. Any ideas? Thanks in advance.

:)

 

How to boot into bootable differencing vhdx in Hyper-V

Hello,

I am trying to upgrade my boot to VHD VHDX to the latest Windows 10 update using this terrific tutorial from @Kari: Native boot Virtual Hard Disk - How to upgrade Windows

However, I am having trouble getting the vhdx to boot in Hyper-V. Everything seems to work as expected, but when I get to step 1.18, Hyper-V gives a "The boot loader did not load an operating system" error booting off the VHDX.

I wonder if the boot files are getting created appropriately. When I run

c:\windows\system32\bcdboot c:\windows /s c:

it says it worked correctly, but if I run

bcdedit /v

after that, it says "The boot configuration data store could not be opened. The requested system device cannot be found."

The c: drive is available via the windows installation command prompt.

Other possibly useful information:
- The VHDX is a differencing disk, and the parent VHDX file is read-only
- The VHDX was created in Windows and initialized for Windows install using DISM. It was not created in Hyper-V.

Any ideas? Thanks in advance.

 

How to boot into bootable differencing vhdx in Hyper-V

Hi there

You can try this method (from the Ms documentation) which doesn't need HYPER-V features so should work on any Windows version.

https://docs.microsoft.com/en-us/win...-the-boot-menu

Cheers
jimbo

 

How to boot into bootable differencing vhdx in Hyper-V

Hi there
OK understand now !!!
Cheers
jimbo