Difference between physical and virtual keys

Hi,

I am a member of MAPS (Microsoft Action Pack) and for Windows Server 2008 they have two sets of keys - Physical and Virtual. Can anyone tell me the difference between the two?

I am assuming Virtual is for using in Virtual Machines but this is just a guess.

Thanks

From serverfault blade

• That guess is correct. Physical is for a traditional installation, Virtual is for use in a VM.

  From MarkM