If you want to replicate a virtual machine in VirtualBox, you have two options: Export and import to a separate computer or Create a clone.

Hyper-V 3 in Windows Server 2012 has some new advanced features for registering a virtual machine and options for importing them into Hyper-V.

I'm trying to import the VM into my 4.1 vSphere cluster. I've powered down the machine, made sure it wasn't set to use an ISO on it's CDROM (not sure if that would matter or not), etc.