Try and give the volume or label a name and run a checkdisk below..
chkdsk C: /F /R /X
I'm assuming the C: drive is your OS drive. 
Then try all the possible processes to P2V.
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Re: "ERROR: Unable to find the system volume, reconfiguration is not possible" - Win8 64bit P2V with VMware Converter 5.5.0
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