Hyper-V Snapshots

Hyper-V virtual machine snapshot is a point in time image of virtual machine. Snapshots can be taken at any time with any guest operating system even during installation.

Using snapshots can impose limitations if you want to reconfigure a virtual machine. You will find that you cannot edit certain settings if snapshots exist for the virtual machine. Snapshots will have to be deleted before you can regain access to these settings.

Delete Snapshot ...
Deletes selected snapshot

Delete Snapshot Subtree ...
Deletes all snapshots for the virtual machine