When Import a VM via Hyper-V Manager GUI, after the VM folder is located and the VM is selected, at step 3 I am asked to «Choose Import Type» and I have three options to choose from:
•Register the VM in-place
•Restore the VM
•Copy the VM
If you have a virtual machine were you have already put all of the virtual machine files exactly where you want them, and you just need Hyper-V to start using the virtual machine where it is – this is the option you want to choose.
If your virtual machine files are stored on a file share / removable drive / etc… and you want Hyper-V to move the files to the appropriate location for you, and then register the virtual machine – this is the option for you.
If you have a set of virtual machine files that you want to import multiple times (e.g. you are using them as a template for new virtual machines) this is what you want to choose. This will copy the files to an appropriate location, give the virtual machine a new unique ID, and then register the virtual machine.
This is an interesting link, but it applies ONLY to windows 2008: