VM won't start, unable to mount VHD file

Question

Hello,
Last night I powered off my Windows 8.1 Pro machine running Hyper-V and one of the virtual machines may have gotten forced down hard.  This morning when I tried to start it I am getting:
BOOTMGR is missing
Press Ctrl+Alt+Del to restart
My first suspicion was that the .VHD was corrupted and needed repairing.  In the VMware world I would mount the disk to another VM and use various tools on it (chkdsk, etc) I believe Windows actually makes this a little easier by allowing mounding of
a .VHD within disk manger.  I mount the disk and see the following image:
Although the size is correct the disk comes up as RAW (Which seems odd to this hyper-V newbie).  I am unable to explore the contents of the drive, I get the error "F:\ is not accessible.  The file or directory is corrupted and unreadable."
I have a crazy suspicion that the drive is still locked by Hyper-V as if it is still running.  Naturally I have confirmed the virtual machine appears offline.  Is it possible that some kind of lock was not fully released when the machine was powered
off?  Any other troubleshooting tips I could try?

Answer 1

Hi,
I don’t found the similar issue, if you have the backup of this vm, you can try to recovery it ,then try to start it again, or you can try the following method for the further
troubleshooting:
Method 1:
Backup this guest vm, use the VHD tool to fix that VHD.
Method 2:
Merge this vm checkpoint then try to start it again.
The VHD Tools download:
VHD tool
http://archive.msdn.microsoft.com/vhdtool
Hope this helps.
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