I am almost positive this is due to a parallels update making this fail, we have a similar issue last time, the issue is that windows is not booting up going into a loop.
I am going to take a two pronged method of getting all back here on it, and that will be to bring up new hardware and move the VMs still on it (not many as we are moving people off of this virtuozzo) and split up into two servers. Won't be but a couple on each machine, but that is just fine to me now.