I'm getting the..

"You are not running on a supported operating system. Please see Microsoft
Virtual PC help for the list of supported host operating systems.
Virtual PC might run on other operating systems, but these configurations
will not be supported by Microsoft Product Support Services."

... when I start Virtual PC SP1 for 32kb Vista (I never installed it before
this).

However I am running a fully updated legally bought version of Vista Premuim
32kb, and I've never before experienced a similar situation like this.

The problem results in a error during startup of a virtual machine
First:
When I try to run Virtual PC when it gets stuck at "Client MAC ADDR: xx xx
xx xx xx xx GUID: xxxxxx-xx-xxxxxxxxxx-xxx (I'ved x'ed the numbers and so on
because I assume it might be hazadous to post)

Then:
It times out after a few mins and says "no bootfilename received"

After
It says "Reboot and Select proper Boot device or Inster Boot Media in
selected Boot device"

Please are there anyone who can assist me? - I cannot see what I have done
wrong, not does it appear that other threads have posted similar problems.