Virtual Machines QUIT UNEXPECTEDLY in Hyper-V Environment

Hi there ,

I installed lots of machine in my SCVMM ... my server is quite powerful with 32 gb ram on it etc ,.
Resently my guest machines are quitting unexpectedly ... not sure why that is happening ...

Eventvwr  error copy attached ... please give me a shout if you need anything else to sort this problem ...

I have seen one more question been raised on this one before under the same title but not really sure what was the conclusion ....
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name="Microsoft-Windows-Hyper-V-VMMS" Guid="{6066f867-7ca1-4418-85fd-36e3f9c0600c}" />
  <EventID>14070</EventID>
  <Version>0</Version>
  <Level>2</Level>
  <Task>0</Task>
  <Opcode>0</Opcode>
  <Keywords>0x8000000000000000</Keywords>
  <TimeCreated SystemTime="2009-09-04T10:16:57.996Z" />
  <EventRecordID>268</EventRecordID>
  <Correlation />
  <Execution ProcessID="2184" ThreadID="4292" />
  <Channel>Microsoft-Windows-Hyper-V-VMMS-Admin</Channel>
  <Computer>MLCTESTSRVS2.mlctest.co.uk</Computer>
  <Security UserID="S-1-5-18" />
  </System>
- <UserData>
- <VmlEventLog xmlns:auto-ns2="http://schemas.microsoft.com/win/2004/08/events" xmlns="http://www.microsoft.com/Windows/Virtualization/Events">
  <Parameter0>ILS-ILB-VISTA02</Parameter0>
  <Parameter1>F082A915-C785-402B-8341-7AB355622B24</Parameter1>
  </VmlEventLog>
  </UserData>
  </Event>