Hyper-V virtual reverted to over a year old version

I have a Windows Server 2008 Standard server running Hyper-V.
All was good until we had a power outage the other day and my UPS batteries were not holding a charge for long (shame on me for not checking).  The servers powered off instead of being shut down.  I powered them all back on and things looked OK, until I realized 1 of my virtual servers reverted back to over a year ago.  
The program I had installed is still there and my credentials log me in, so I thought the program was running fine.  Now, I realize the data on that server is over a year old.
I've setup a number of Hyper-Vs and things have been working great, but I haven't had to do any real troubleshooting on an issue like this.
Any help in determining how this might have happened and, especially, recovering my virtual is greatly appreciated.  I would restore it to a current state, but this virtual is running my backup software, so I have nothing to restore.
rickmillsPresidentAsked:
Who is Participating?
 
kevinhsiehConnect With a Mentor Commented:
The only way I can think of something like that happening is if you had a snapshot of the VM, probably a Hyper-V snapshot. Do you have any AVHD files on the host? Those are the snapshot files, and you should not have any snapshots  for more than a few days at a time.
0
 
rickmillsPresidentAuthor Commented:
It turns out it was an issue with the software that made it appear as though it had reverted back to an older version of the VHD.  Sorry, as I jumped the gun on that diagnosis.
This can be closed.
0
 
rickmillsPresidentAuthor Commented:
It turns out it was an issue with the software that made it appear as though it had reverted back to an older version of the VHD.  Sorry, as I jumped the gun on that diagnosis.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.