That's definitely what is happening...

--
Bob Comer


On Tue, 1 Apr 2008 12:33:37 -0700 (PDT), Mike <mhowells@gmail.com>
wrote:

>On Apr 1, 11:33am, Robert Comer <bobcomer-remove...@mindspring.com>
>wrote:
>> The VHD's with the Hyper-V integration components will not run on
>> Virtual Server, they wont even boot for enough to BSOD it looks like.
>> The kernel initialization is probably looking for something that isn't
>> there and wont go any further.
>>
>> --
>> Bob Comer
>>
>> On Tue, 01 Apr 2008 11:43:01 -0400, Robert Comer
>>
>>
>>
>> <bobcomer-remove...@mindspring.com> wrote:
>> >>How about going the other way?
>>
>> >>Going from a guest OS that has been migrated to Hyper-V (with its new
>> >>VM Additions) back to Virtual Server 2005 R2 SP1 x64 Edition?
>>
>> >>Will the VM power-up and function properly?
>>
>> >I don't know, but my guess would be that you'd need to uninstall the
>> >integration components before the move and it would probably BSOD if
>> >run in a VS2005 vm if you didn't. Just a guess though, but it is one
>> >thing I can test quickly, and I'll respond again with the answer
>> >shortly. (just need time to copy a VM to test with.)- Hide quoted text -
>>
>> - Show quoted text -
>
>Sounds like Hyper-V is modifying the HAL on the guest OS.