Hyper-V Manager not connecting to Virtual Machines

Last night I had a VM that didn't backup. This morning when I investigated it I could not ping the VM. I logged into the VM via the host's VM Manager and all looked well with the exception of it not seeing any computers on the domain. I rebooted the VM and after a few minutes it still said "stopping" in the VM Manager even though the VM said it was turned off and needed to be started. Of course, start was not an available option. I did some googling and ran across this article for killing the hung VM (http://community.spiceworks.com/how_to/show/528-killing-ending-a-hyper-v-virtual-machine-that-is-stuck) ... I downloaded the reference Process Explorer program and killed the process for the hung VM and it did go to the "Off" mode; however, start was still not an option. I restarted the three Hyper-V services and now when I try to launch VM Manager I get "connecting to virtual machine management service" and after about a minute get "you might not have permission to perform this task" ... I know if I reboot the host it will probably clear this up, but I would like to find a way get the VM Manager to load so I can see all the VMs and hopefully start the down VM and avoid taking the other ten VMs down with it. The host is running W2008 R2 SP1.
OGDITAdminAsked:
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
How long has the host been up?

Is the host a member of a domain hosted by the guest(s) or in a workgroup?

Did the stalled VM have snapshots associated with it?
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OGDITAdminAuthor Commented:
I rebooted the server after business hours and all is well.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
How long was the server up for?

With 08 R2 and full GUI our experience is the host needs to be rebooted between 6-8 months maximum before weirdness starts happening. With Server Core we have hosts that have not been rebooted for years.
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OGDITAdminAuthor Commented:
The host and all VMs were all rebooted on July 7th after MS updates.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
That seems to be awfully short a time between then and now. :S

Anything else running on the host besides the Hyper-V Role? A/V?
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OGDITAdminAuthor Commented:
Reboot fixed the problem ... please close the ticket.
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Seth SimmonsSr. Systems AdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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