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Hyper-V virtual machines unable to start after upgrading to 2008 r2 Enterprise

Experts,
I recently upgrade windows server 2008 r2 standard to r2 enterprise (hyper-v role). The upgrade went smooth after I unistalled sp1.

After upgrading, I attempted to start the virtual machines and failed. I received error unable to initialize virtual machine.

Please advise on how to get the virtual machines back up. I am currently running updates...
I am assuming when I uninstalled sp1, it uninstalled hyper-v role?

please help..
0
cpatelx
Asked:
cpatelx
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1 Solution
 
Imtiaz HashamTechnical Director / IT ConsultantCommented:
Can you tell me what the event viewer says please?
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compdigit44Commented:
Did you check the permission on the volume which host your VHD files to make sure they did not change post upgrade
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cpatelxAuthor Commented:
I had to reinstall SP1 once upgrade to R2 Enterprise was complete (ran windows update). Once, updated I am was able to start up the virtual machines.
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cpatelxAuthor Commented:
Ran windows update
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