Hyper-V: restore of virtual machines

I have an urgent question.
I have a Windows 2008 R2 server with Hyper-V.
I only have file-backup of the folder where the virtual machines was stored (not VSS).
Now I have restored the VM-files (overwriting the old ones).
But I┬┤m unable to open the VMs in Hyper-V.

What can I do?
stebysheAsked:
Who is Participating?
 
Philip ElderConnect With a Mentor Technical Architect - HA/Compute/StorageCommented:
In Hyper-V Manager:
 Right click VM --> Settings --> IDE --> Remove VHD --> APPLY --> ADD HDD --> Choose VHD --> APPLY & OK
Repeat for other VHD file(s) in VM.
Repeat process for other VMs.
Once done try and start the first one. It _should_ start unless something is corrupt on the host.
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MaheshArchitectCommented:
Has the file extension is VHD?

does the restored VM contains OS or simply data?

U can mount this VHD file in disk management if this just data file
http://www.thomasmaurer.ch/2010/12/howto-attach-detach-vhd-in-windows-server-2008-r2/

If old VHD also contains OS as well, then it cannot be recovered
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Carol ChisholmCommented:
Could you post a list of the files you have?
And the exact error message?
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bbaoIT ConsultantCommented:
> Now I have restored the VM-files (overwriting the old ones).

how did you restore the VM files? simply import the VM folder or create a new VM using the existing VHD?

as a best pratice, did you make one more backup before opening the backup?
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Lionel MMSmall Business IT ConsultantCommented:
What happens when you try to start the VM? What error are you getting? Can you also please do a icacls of the virtual disks and post those results (run from a command prompt).
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bbaoIT ConsultantCommented:
any feedback from the author please?
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